La monetazione di Olinto del tipo Apollo/lira, la quale copre un arco temporale compreso tra il 392 a. C., anno della formazione della Lega Calcidica secondo Head e il 348 (v. link), quando Filippo di Macedonia si impadronì della Calcidica, comprende nominali in oro (come il rarissimo statere sottostante), in argento (tetradrammi e tetroboli) e in bronzo (AE15/17). La lista che segue comprende alcuni esemplari autentici reperiti nel web che ci saranno utili per definire le caratteristiche fisiche di massima di queste emissioni:

Oro (statere)¹:

1. http://www.cngcoins.com/Coin.aspx?CoinID=230749 Extremely Rare Chalkidian League Stater CNG 93, Lot: 135. Estimate $75000. Sold for $80000. This amount does not include the buyer’s fee. MACEDON, Chalkidian League. Circa 365-359 or 357-348 BC. AV Stater (17mm, 8.62 g, 12h). Olynthos mint. Head of Apollo right, wearing laurel wreath, with long hair in a single plait down the back of his neck / Kithara, star on lower right panel; X-A-Λ-KIΔ-EΩN around. Unpublished. Near EF, underlying luster, minor flan flaw at 3 o’clock on reverse. Extremely rare denomination, only three have appeared at auction in recent decades (CNG 91 [2012], lot 120; New York Sale XXV [2011], lot 24; and CNG 87 [2011], lot 292; none in the ANS photofile). Ex Triton XV (3 January 2012), lot 1107 (sold for hammer $120,000, but not paid). Taking advantage of the loosening of Athenian control over the Chalkidike due to the Peloponnesian War, in 432/1 BC the cities of the region formed themselves into a league with its capital at Olynthos. The failure of Athens to break up the Chalkidian League - one of the terms of the Peace of Nikias in 421 BC - as well as a general strategic disinterest in the region, helped to solidify the League's power and position. As a result of this situation, the League began striking silver coinage in its own name. Adopting the local "Phoenician" standard already in use by Olynthos, only tetrobols were minted in any quantity at first, but after about 420 BC, tetradrachms were regularly struck. The very rare issues of gold staters, struck on the Attic standard, are certainly tied to the tumultuous events in the second quarter of the 4th century BC. The political situation in which the League found itself at that time was influenced by the competing interests of Athens, who had historic ties to the region, Sparta, who constantly sought to check any advance of Athenian power, and the Macedonian Kingdom, which sought to expand its influence over its neighbor to the south. Sparta's defeat at Leuktra in 371 BC, and the subsequent peace, provided Athens with the opportunity to reconstitute the Second Athenian Empire, beginning with the Chalkidike. In 365 BC, the Athenian general, Timotheos, began to conquer territory in the northern Aegean on behalf of Athens. He quickly subdued the island of Samos and gained a foothold in the Thracian Chersonese, from where he could direct his attention to the Chalkidike. With the help of Perdikkas III of Macedon, Timotheos attacked the League and its capital, Olynthos. Although unable to take the capital, Timotheos was successful in quickly capturing a large part of the League's territory. His campaign was so successful that he used the opportunity to attack his erstwhile ally, Macedon, as well. In 363 BC, in addition to seizing the city of Potidaia, an important Chalkidian port near the League capital of Olynthos, Timotheos also captured the Macedonian ports of Methone, Terone, and Pydna, located in the Thermian Gulf. For all of his initial success against the Chalkidian League, however, Timotheos was unable to conquer Amphipolis, or solidify his hold over the areas he seized, and eventually abandoned his northern Aegean enterprise in 360 BC. In the years immediately following, it would be Amyntas' youngest son, Philip II, who would achieve what both the Chalkidian League and Timotheos were unable to do - bring the entire region and all of its cities and tribes under one authority. In 348 BC Philip dissolved the League. For what purpose were these extremely rare Attic-standard gold staters struck? Given the regional turmoil at the time, a possible explanation would be that the coins were an emergency issue meant for the payment of local Thracian mercenaries due to a scarcity of silver. Psoma, however, shows that the League regularly struck significant amounts of silver coinage during this period, something that would be impossible if no supply of silver was available. As such, payments to mercenaries probably would have been in the form of the League's silver issues, whose Phoenician weight standard was common throughout the region. At this time, gold was rarely coined in the Greek world, with only the Persian Empire and Kyzikos minting issues with any regularity. Most often gold was struck when necessity required its use, as it had been at Athens late in the Peloponnesian War. Coinciding as it did with the League's war against Athens, this gold issue (as well as similar extremely rare gold Attic staters issued from the League's then ally Amphipolis) had to be struck not for local consumption, but for foreign recipients who required payment in coinage struck on the Attic standard. Bribes in gold are known to have been a part of classical diplomacy. The Persian Empire tried to affect the outcome of the Peloponnesian War by funneling darics to both Athens and Sparta, and Philip II, once he gained control of Mt. Pangaion, struck coinage on the Attic standard (including staters), which he used to gain control over the Greek city-states (cf. Dem. 5.5). Thus, if the League's staters were not for payments to mercenaries, they most likely were made to acquire influential overseas support through bribes. Approximately twelve staters of the League are known. At the time of the publication of Psoma’s study in 2001, only Robinson & Clement Groups L (1 coin), S (1 coin), T (1 coin), and W (3 coins), were known to have staters associated with them. Three other staters, all from one die pairing, however, remain unassigned, and likely belong to an unrecorded magistrate: B.M. Yakountchikoff, Unpublished and rare Greek coins (St. Petersburg, 1908), p. 8, no. 17; SNG ANS 468; and New York Sale XXV (2011), lot 24. The CNG 87 piece added yet another new issue to the corpus of Chalkidian coinage, belonging either to Group L or a heretofore unknown transitional group between Groups L and M. The placement of the present stater and CNG 91 piece within the series is uncertain. While the bottom of their reverses is not fully visible, the contour of the lower part of the kithara indicates that it is just above the lower edge of the die, leaving no room for a magistrate's name below the kithara. Although it is tempting to place them in the same period as the CNG 87 stater, pre-dating the magistrate issues, the style of their obverse makes this more difficult. The austere features of the portrait and the long hair depicted in a single plait are unlike all the depictions of Apollo in the known coinage. Nevertheless, the gold denomination was an exceptional one in the series, and it is very plausible that the die engraver of this issue was not involved in the regular silver and bronze issues. The appearance of a subsidiary symbol, a star, on the kithara, may be more helpful in suggesting a placement of the issue in the larger series. The last pre-magistrate group, Group M, also has a subsidiary symbol on the reverse, a tripod. At the same time, Group M also features a variety of obverse styles, with right and left-facing heads, and with long and short hairstyles. As such, it is possible that this stater is from a new group either preceding or following Group M. One other possibility exists. As the star is a symbol of the Macedonian royal house, one wonders whether its appearance here serves as some reference to Macedonian authority? Philip II allied with the League against Athens after the latter declared war against him in 357 BC. This military alliance proved fruitful for both parties, enduring until the 349 BC, and could have necessitated a special issue of staters.

Argento (tetradrammo)²:

1. http://www.acsearch.info/search.html?id=96400 A. Tkalec AG http://www.coinstkalec.ch/ Auction February 2002 25 (« | ») 18. February 2002 Description GRIECHEN Makedonien No.: 25 Rufpreis-Opening bid: CHF 8000.- CHALKIDISCHE LIGA AR - Tetradrachme 13,97g Olynthos ca. 432 - 348 v.Chr. Av: Lorbeerbekränzter Kopf des Apollo nach rechts. Rv: CAL- KID- [EWN]; Siebensaitige Lyra. SNG ANS 477. Feiner Stil Vorzüglich.
2. http://www.acsearch.info/search.html?id=1087489 Gerhard Hirsch Nachfolger http://www.coinhirsch.de/ Auction 275 3447 (« | ») 22. September 2011 Description OLYNTHOS. Als Hauptstadt des chalkidischen Bundes. Tetradrachme. 433-348. Belorbeerter Kopf des Apollo Olynthios r. Rs: XA_KI_E_N; Lyra mit 6 Saiten. SNG ANS 495 var. 14,42g. Sehr hohes Relief. Vs. kl. Stempelfehler. Rs. min. Schürfspur. vz-St.
3. http://www.acsearch.info/search.html?id=1479505 Heritage Auctions, Inc. http://coins.ha.com/ 2013 January Ancient & World Coin Signature Auction 21143 (« | ») 6. January 2013 Description MACEDON. Chalcidian League. Ca. 390 BC. AR tetradrachm (22mm, 14.48 gm, 12h).  Olynthos mint. Laureate head of Apollo right / Kithara within incuse square; X-A-Λ-KI[Δ]-EΩN around. Robinson & Clement group F, - (unlisted dies). SNG ANS -.  Good Extremely Fine. The Chalcidice is a three-fingered spit of land extending from eastern Macedon into the Aegean Sea. Wary of Athenian imperialism and the rising power of the Macedonian Kingdom, the free cities of the Chalcidice banded together in 432 BC to form a defensive coalition called the Chalcidian League, with its capital of Olynthus. The silver coinage struck at Olynthus was on the Macedonian standard, somewhat lighter than the Attic standard employed by most of Greece, and was legal tender at all cities belonging to the league. The standard design featured a head of Apollo, god of beauty, art and music, with a type of lyre called a cithara on the reverse. The heads of Apollo on these pieces are remarkable for the strength and beauty of their style. Sadly, the Chalcidian League's coinage came to an end with the capture and destruction of Olynthus by King Philip II of Macedon in 348 BC.
   
4. http://www.acsearch.info/search.html?id=1545182 Heritage Auctions, Inc. http://coins.ha.com/ 2013 April CICF World & Ancient Coins Signature Auction 24590 (« | ») 18. April 2013 Description MACEDON. Chalcidian League. Ca. 390 BC. AR tetradrachm (27mm, 14.44 gm, 12h). Olynthos mint. Laureate head of Apollo right / Kithara within incuse square; X-A-Λ-KI[Δ]-EΩN around. Robinson & Clement group F, - (unlisted dies). SNG ANS -.  Deeply struck in choice metal from fresh dies of high style. Choice Mint State. The Chalcidice is a three-fingered spit of land extending from eastern Macedon into the Aegean Sea. Wary of Athenian imperialism and the rising power of the Macedonian Kingdom, the free cities of the Chalcidice banded together in 432 BC to form a defensive coalition called the Chalcidian League, with its capital of Olynthus. The silver coinage struck at Olynthus was on the Macedonian standard, somewhat lighter than the Attic standard employed by most of Greece, and was legal tender at all cities belonging to the league. The standard design featured a head of Apollo, god of beauty, art and music, with a type of lyre called a cithara on the reverse. The heads of Apollo on these pieces are remarkable for the strength and beauty of their style. Sadly, the Chalcidian League's coinage came to an end with the capture and destruction of Olynthus by King Philip II of Macedon in 348 BC.
5. http://www.acsearch.info/search.html?id=1236765 Roma Numismatics Limited http://www.romanumismatics.com/ Auction 3 139 (« | ») 31. March 2012 10'000 GBP 8'000 GBP Description Macedon, Chalkidian League AR Tetradrachm. Olynthos, circa 355-352 BC. Ariston, magistrate. Laureate head of Apollo right / ΧΑΛΚΙΔΕΩΝ around Lyre with six strings; ΕΠΙ ΑΡΙΣΤΩΝΟΣ below. Gulbenkian 422; Robinson & Clement 134; SNG ANS 497. 14.47g, 27mm, 3h. Extremely Fine. A beautiful portrait; struck on a broad flan and pleasantly toned. A truly stunning tetradrachm, engraved in fine style and struck on a very broad flan. Subtle iridescent hues highlight the handsome classical portrait of Apollo. Olynthos took its name from the Greek olunthos – a fig which matures too early, for the area abounded with this fruit. Olynthos, son of Herakles, was according to tradition the founder of this city which rose to prominence as head of the Chalkidian League during the Peloponnesian War. Philip II of Macedon deprived the city of its League by both diplomacy and force, then undertook to besiege the city itself in 348 BC. Through the treachery of the city’s two leading citizens Euthycrates and Lasthenes, the city was betrayed to Philip, who sacked the city, razed it to the ground and sold all those within, including an Athenian garrison, into slavery.
6. SNGuk_0700_0618 Ref. VII Manchester University Museum. State: Olynthus. Denomination: Tetradrachm Period: -400 to -370. Obv: Apollo laur. Rev: Lyre. Material: AR Weight: 14,39 Axis: 7 Width: 22 SNGuk_0700_0618.

1. http://www.acsearch.info/search.html?id=10403 Forvm Ancient Coins http://www.forumancientcoins.com/ Description Olynthos, Chalkdian League, Macedonia, 432 - 348 B.C. 14413. Silver tetrobol, BMC Macedon, 68, 13; SNG Cop 235v, nice VF, Olynthos mint, 2.261g, 15.0mm, 90°, c. 410 - 401 B.C.; obverse laureate head Apollo right, circle of dots around; reverse XAΛK[IA]EΩN around lyre with seven strings, all within incuse; of finest classical style, great reverse strike, nicely toned; scarce; SOLD.
2. http://www.acsearch.info/search.html?id=1087491 Gerhard Hirsch Nachfolger http://www.coinhirsch.de/ Auction 275 3449 (« | ») 22. September 2011 175 EUR 220 EUR Description OLYNTHOS. Als Hauptstadt des chalkidischen Bundes. Tetrobol. 433-348. Belorbeerter Kopf des Apollo Olynthios r. Rs: XA_KI_[E_N]; Lyra. SNG ANS 527. 2,34g. Hohes Relief. vz-ss.
3. http://www.acsearch.info/search.html?id=2113771 Gitbud & Naumann https://www.gitbud-naumann.de/ Auction 21 89 (« | ») 7. September 2014 50 EUR 80 EUR Description MACEDON. Chalkidian League. Tetrobol (Circa 432-348 BC). Olynthos. Obv: Laureate head of Apollo right. Rev: XALKIΔEΩN. Lyre. SNG ANS 525 ff. Condition: Very fine. Weight: 2.23 g. Diameter: 14 mm.
4. http://www.acsearch.info/search.html?id=803124 Jean Elsen & ses Fils S.A. http://www.elsen.be/ Auction 105 56 (« | ») 12. June 2010 - - Description MACEDOINE, OLYNTHOS, Ligue chalcidienne, AR tétrobole, début du 4e s. av. J.-C. Droit : Tête l. d'Apollon à droite. Revers : XAΛ-KI-ΔΕ-ΩΝ Lyre heptacorde. Le tout dans un carré creux. Ref.: Robinson-Clément, 63; SNG ANS 534. 2,20g. Beau à Très Beau F - VF Estimate: EUR 75.
5. http://www.acsearch.info/search.html?id=895067 Pegasi Numismatics http://www.pegasionline.com/ Auction XXIII 75 (« | ») 23. November 2010 275 USD 450 USD Description. CHALKIDIAN LEAGUE, Olynthos. 432-348 BC. AR Tetrobol (2.31 gm). Laureate head of Apollo / Lyre. SNG.ANS.520v. Toned VF. [Est. $450].
6. http://www.acsearch.info/search.html?id=975461 Pegasi Numismatics http://www.pegasionline.com/ Auction XXIV 85 (« | ») 5. April 2011 225 USD 225 USD Description MACEDON, Chalkidian League, Olynthos. 432-348 BC. AR Tetrobol (2.21 gm). Laureate head of Apollo / Lyre in incuse square. SNG.ANS.533. Toned aVF. [Est. $350].
7. http://www.acsearch.info/search.html?id=1692305 Gerhard Hirsch Nachfolger http://www.coinhirsch.de/ Auction 293 2162 (« | ») 25. September 2013 120 EUR 190 EUR Description GRIECHISCHE MÜNZEN, GRIECHISCHES MUTTERLAND, MAKEDONIEN, OLYNTHOS. Als Hauptstadt des chalkidischen Bundes.Tetrobol. 433-348. Belorbeerter Kopf des Apollo Olynthios r. Rs: Lyra. SNG ANS 525 ff. 2.83g, Rs. kl. Schürfspur. vz-ss.
8. http://www.acsearch.info/search.html?id=1692306 Gerhard Hirsch Nachfolger http://www.coinhirsch.de/ Auction 293 2163 (« | ») 25. September 2013 120 EUR 190 EUR Description GRIECHISCHE MÜNZEN, GRIECHISCHES MUTTERLAND, MAKEDONIEN, OLYNTHOS. Als Hauptstadt des chalkidischen Bundes.Tetrobol. 433-348. Belorbeerter Kopf des Apollo Olynthios r. Rs: Lyra. SNG ANS 525 ff. 2.42g, Rs. Kratzer. fast vz.
9. http://www.acsearch.info/search.html?id=1040039 Numismatik Lanz München http://www.numislanz.de/ Auction 151 39 (« | ») 30. June 2011 150 EUR - Description GRIECHISCHE MÜNZEN (SLG. DIEZ). MAKEDONIEN OLYNTHOS Chalkidischer Bund. Tetrobol, ca. 410-401. Kopf des Apollon mit Lorbeerkranz nach rechts. Rs: X-A-Λ/KIΔ-EΩN, Lyra in Quadratum incusum. BMC 13 (Chalcidice, ca. 392-379); SNG Cop. 243; SNG ANS 531 (ca. 432-348); AMNG III/2 - 12 (ca. 420-348). 2,06g. Schöne Tönung, sehr schön. Ex Doubletten d. Königl. Münzcabinets zu Berlin aus Slg. Dr. Imhoof-Blumer, Adolph Hess Nachf., Auktion (12. März 1906, Frankfurt a. M.) Nr. 197.
10. http://www.acsearch.info/search.html?id=1251462 Gerhard Hirsch Nachfolger http://www.coinhirsch.de/ Auction 281 196 (« | ») 2. May 2012 180 EUR - Description GRIECHISCHE MÜNZEN GRIECHISCHES MUTTERLAND MAKEDONIEN OLYNTHOS. Als Hauptstadt des chalkidischen Bundes. Tetrobol. 433-348. Belorbeerter Kopf des Apollo Olynthios r. Rs: Lyra. SNG ANS 515. 2.21g. Schöne Tönung. vz-ss.
    

Bronzo (AE15/16)⁴:

1. http://www.acsearch.info/search.html?id=17665 Forvm Ancient Coins http://www.forumancientcoins.com/ Description Olynthos, Macedonia, Chalcidian League, c. 432 - 348 B.C. 21290. Bronze AE 15, SNG ANS 552, aVF, Olynthos mint, 4.988g, 15.4mm, 0°, c. 432 - 348 B.C.; obverse laureate head of Apollo right; reverse X-A-Λ-KIΔ-EΩN, lyre; black patina; SOLD.
2. http://www.acsearch.info/search.html?id=25271 Forvm Ancient Coins http://www.forumancientcoins.com/ Description Olynthos, Macedonia, Chalcidian League, c. 432 - 348 B.C. 30235. Bronze AE 16, SNG ANS 552, SNG Cop 246, VF, Olynthos mint, 4.176g, 15.9mm, 270°, c. 432 - 348 B.C.; obverse laureate head of Apollo right; reverse X-A-Λ-KIΔ-EΩN, lyre; nice style; SOLD.
3. http://www.acsearch.info/search.html?id=2746 Forvm Ancient Coins http://www.forumancientcoins.com/ Description Chalkidian League, Olynthus, 432-348 B.C. 796. Bronze AE 16, SNG Cop 246, S 1433, VG, 3.40g, 15.8mm, 180°, obverse laureate head of Apollo right; reverse XAΛKIΔEΩN, lyre; SOLD.
4. http://www.forumancientcoins.com/gallery/displayimage.php?pos=-73238 Macedonia, Olynthos (Chalkidian League) Obverse: Laureate head of Apollo right. Reverse: X-A-L-K-I-D around lyre or cithara. Metal: AE 15. Weight: 5.7 grams. Mint: Olynthos. Date: 432-348 BCE. References: Sear #1433; SNG Cop. #246, BMC Macedonia p. 69, 29-30.
5. http://www.acsearch.info/search.html?id=1039169 CGB.fr http://www.numishop.com MONNAIES 49 147 (« | ») 30. June 2011 Description MACEDONIA - CHALKIDIAN LEAGUE - OLYNTHOS Unité, (PB, Æ 17) 379-348 AC. Macédoine, Olynthe R1 copper (17mm, 4,15g, 6h). Obverse : Anépigraphe Tête laurée d’Apollon à droite, les cheveux longs tombant sur la nuque Reverse : Cithare. Ref : Laffaille03 ANS.555 Cop.246. Pedigree : Cet exemplaire provient de MONNAIES XXVI, n° 38 (2006). Grade: VF. Coments on the condition : Exemplaire sur un petit flan ovale, bien centré des deux côtés. Beau portrait d’Apollon. Joli revers bien venu à la frappe servi par une jolie patine vert clair et sable. Starting Price : 145.00 Euro. Estimate : 250.00 Euro.
6. http://www.acsearch.info/search.html?id=1928759 Roma Numismatics Limited http://www.romanumismatics.com/ E-SALE 7 311 (« | ») 26. April 2014 Description Macedon, Olynthos as Chalkidia League Æ15. Circa 432-348. Laureate head of Apollo right / Kithara. SNG ANS 552-553. 4.77g, 15mm, 8h. Dark patina, Very Fine.
7. http://www.acsearch.info/search.html?id=310362 CGB.fr http://www.numishop.com MONNAIES 26 38 (« | ») 22. June 2006 Description LIGUE CHALCIDIQUE - OLYNTHE (432-348 avant J.-C.) Bronze, (PB, ئ 17) N° v26_0038 Date: 379-348 AC. Nom de l'atelier: Olynthe Métal: argent. Diamètre: 17mm. Axe des coins: 6h. Poids: 4,14g. Degré de rareté: R1 Etat de conservation: TTB Prix de départ: 120 €  Estimation: 180 €. Prix réalisé: 130 €  Nombres d'offres: 2 Offre maximum: 165 €. Commentaires sur l'état de conservation: Flan ovale et épais. Jolie patine vert olive clair. Cithare bien venue au revers. N° dans les ouvrages de référence: ANS.555. Titulature avers: Anépigraphe. Description avers: Tête laurée d’Apollon à droite. Description revers: Cithare. Légende revers: X-A-Λ/KIΔ/EΩN. Commentaire à propos de cet exemplaire: Semble de même coin de revers que l’exemplaire de l’American Numismatic Society. Commentaires: Pour les monnaies de la Ligue Chalcidique (432-348 avant J.-C.), on distingue quatre périodes bien distinctes de fabrication: 1) de 432 à 420 avant J.-C. ; 2) de 420 à 392 avant J.-C. ; 3) de 392 à 379 avant J.-C. ; 4) de 379 à 348 avant J.-C. Historique: En 433 avant J.-C. Perdiccas II, roi de Macédoine releva Olynthe et en fit la capitale de ce qui allait devenir la Ligue chalcidique afin de contrecarrer les visées d'Athènes dans la région. Brasidas à la tête de la flotte lacédémonienne rallia la région contre l'hégémonie d'Athènes, après la défection d'Amphipolis. La paix de Nicias en 421 avant J.-C. garantissait la liberté des cités de Chalcidique dont Olynthe qui connut alors une intense période de développement économique. Olynthe tomba sous la domination spartiate en 379 avant J.-C. La cité dut affronter les ambitions macédoniennes de Philippe II. Olynthe fut prise et détruite par Philippe II en 347 avant J.-C. et sa population réduite en esclavage.
   

Se si può trarre una conclusione dall'esame delle caratteristiche fisiche delle monete reperite nel web, si può dire che la moneta in esame (4,1g, 15mm), di tipologia metallica piuttosto incerta alla vista, si presenta come un'imitazione dei bronzetti Apollo/Lira di Olinto, molto simili a quelli autentici per peso e diametro.

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Note:
(1) Riferisce Head nel suo Historia Numorum (v. link, pag. 181) che la monetazione in oro è da considerarsi una monetazione di guerra realizzata poco prima del 358. Il peso dello statere aureo reperito nel web è di 8,62g (diametro, 17mm).
(2) Riporto in tabella le caratteristiche fisiche dei tetradrammi della tipologia di figura reperiti nel web: