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Home ▸ Catalog ▸ Themes & Provenance ▸ Numismatics ▸ Mint ErrorsView Options:  |  |  | 

Mint Errors

Ancient coins dies were hand engraved and the coins were hand struck. Significant variation is normal and errors, including spelling errors, off center strikes, double strikes, etc. usually decrease, not increase, the value of ancient coins. On this page we will list only the more unusual errors, beyond those ordinarily expected.


Roman Macedonia, "Thasian" Type, c. 148 - 80 B.C.

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This Dionysos / Herakles type was first struck by Thasos itself on the island and in its continental territories in the South of the Balkans, c. 168 - 148 B.C. After Rome took control of the area, "Thasian" types were struck by Roman authorities, c. 148 - 80 B.C., mainly in Macedonia but also, perhaps, by mobile military mints on campaigns. Imitatives were also struck by at least several tribal groups (mainly Celtic or mixed enclaves) from as early as 120 - 100 B.C. to about 20 - 10 B.C.
GS82789. Silver tetradrachm, Prokopov Thasos, group XII, monogram 18, 639 (V AC1 / R 524); SNG Cop 1042 (Thasos); Lukanc 770, VF, toned, tight flan, bumps and marks, wavy flan, die break on cheek and hair, weight 16.838 g, maximum diameter 31.1 mm, die axis 0o, Roman provincial or military mint, c. 148 - 80 B.C.; obverse head of Dionysos right, wearing taenia and wreathed in flowering ivy; reverse HPAKΛEOYΣ ΣΩTHPOΣ ΘAΣIΩN, Herakles standing half left, nude but for Nemean lion's skin on left arm, resting right hand on grounded club before him, left hand on hip, (MH monogram) inner left; $250.00 (212.50)


Aurelian, August or September 270 - October or November 275 A.D.

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In 271, the Juthungi invaded Italy and sacked the city of Piacenza. A Roman army of 15,000 men under Aurelian was ambushed and defeated at the Battle of Placentia. The Juthungi then moved towards a defenseless Rome. Aurelian rallied his men and defeated the Germanic tribes on the Metauro River, just inland of Fano. After this near disaster, Aurelian began construction of a new defensive wall to protect Rome. The Aurelian Walls, 19 kilometers, enclosed the city with fortifications.
RA88938. Billon antoninianus, MER-RIC 2931 (13 spec), BnF XII 1151, Venra 10109, Gloucester 500, RIC V 355 var., Cohen 259 (20f.) var., VF, well centered, glossy near black patina, small edge splits, weight 3.343 g, maximum diameter 23.2 mm, die axis 0o, 1st officina, Cyzicus mint, 3rd issue, end 271 A.D.; obverse IMP AVRELIANVS AVG, radiate and cuirassed bust right, one globules behind shoulder; reverse VICTORIA GERN (sic), Victory walking left, raising wreath in extended right hand, palm frond in left hand; ex CNG e-auction 411 (13 Dec 2017), lot 451 (misattributed); rare; $130.00 (110.50)


Ptolemaic Kingdom, Ptolemy VI Philometor, 180 - 145 B.C., Reverse Brockage

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A brockage occurs when a blank is struck with a previously struck coin which adhered to the opposite die. Click here to read a detailed explanation.
GP85469. Bronze quarter obol, Svoronos 1408, Weiser -, SNG Cop -, Noeske -, Hosking -, SNG Milan -, Malter -, Tziambazis -, VF, reverse brockage, edge cracks, weight 1.793 g, maximum diameter 13.9 mm, Cyprus, uncertain mint, c. 176 - 170 B.C.; obverse incuse of reverse (normal obverse is diademed head of Zeus-Ammon right); reverse ΠTOΛEMAIOY BAΣIΛEΩΣ (King Ptolemy), eagle standing left on fulmen (thunderbolt), wings closed, lotus in left field; scarce error; $100.00 (85.00)


Gordian III, 29 July 238 - 25 February 244 A.D.

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A rare and very unusual coin with the image of Liberty but the legend for Liberalitas. Apparently the mint officials in Antioch didn't know the difference between these two Roman personifications.
RS87920. Silver antoninianus, RIC IV 187a (R), RSC IV 126, SRCV III 8618, Hunter III -, F, well centered and struck on a broad flan, grainy/porous surfaces, scrape in reverse center, some dark spots, weight 4.713 g, maximum diameter 23.5 mm, die axis 180o, Antioch (Antakya, Turkey) mint, 238 - 239 A.D.; obverse IMP CAES M ANT GORDIANVS AVG, radiate, draped, and cuirassed bust right, from behind; reverse LIBERALITAS AVG (the generosity of the Emperor), Libertas standing slightly left, head left, pileus (freedom cap) in right hand, long transverse rod in left hand; ex Beast Coins; rare; $75.00 (63.75)


Constantius II, 22 May 337 - 3 November 361 A.D., Brockage

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A brockage occurs when a blank is struck with a previously struck coin which adhered to the opposite die. Click here to read a detailed explanation.
RL84593. Bronze reduced centenionalis, aVF, brockage, weight 1.543 g, maximum diameter 15.4 mm, die axis 0o, as caesar, 13 Nov 24 - 22 May 337 A.D.; obverse D N IVL CONSTANTIVS NOB C, laureate and draped bust right; reverse incuse of the obverse; $60.00 (51.00)







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Catalog current as of Friday, March 22, 2019.
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Mint Errors