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Home ▸ Catalog ▸ |Themes & Provenance| ▸ |Numismatics| ▸ |Mint Errors||View 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; $225.00 (198.00)


Lot of 4 United States, Lincoln Memorial Penny, 1970 D, Off Center Error Coins

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US93093. Bronze cent, Uncirculated, off center, clear date and mintmark, Denver mint, 1970; obverse IN GOD WE TRUST, bust of Abraham Lincoln right, 1970 over small D in right field; reverse UNITED STATES OF AMERICA (clockwise above), ONE CENT (counterclockwise below), Lincoln Memorial; $140.00 (123.20)


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 (Kapu Dagh, Turkey) 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 (114.40)


Licinius I, 11 November 308 - 18 September 324 A.D.

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Very unusual mint error! Poor letter spacing on the reverse forced the engraver to make the final two letters extraordinarily small and curve back up to the exergue line. On many examples of this type the last two letters extend into the exergue to the mintmark. This engraver had his own idea of how to handle the problem.
RL89684. Billon follis, Hunter V 170 (also 2nd officina), RIC VII Cyzicus 9, SRCV IV 15237, Cohen VII 114, Choice gVF, bold well centered strike, some silvering, weight 3.196 g, maximum diameter 19.6 mm, die axis 0o, 2nd officina, Cyzicus (Kapu Dagh, Turkey) mint, 317 - 320 A.D.; obverse IMP LICINVS P F AVG, consular bust left, mappa in right hand, globe and scepter in left hand; reverse IOVI CONSERVATORI AVGG (to Jove the protector of the two Emperors), Jupiter standing left, nude but for chlamys over left shoulder, Victory on globe offering wreath in right hand, long scepter in left hand, wreath lower left, B right, SMK in exergue; ex Beast Coins; $120.00 (105.60)


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; $90.00 (79.20)


City of Rome Commemorative, 336 - 337 A.D.

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Much less common than the wolf and twins reverse type.
RL20865. Billon reduced centenionalis, RIC VII Constantinople 143 (R3), LRBC I 1037, SRCV IV 16530, Cohen VII 1, VF, porous, ragged flan, weight 1.453 g, maximum diameter 15.4 mm, die axis 0o, 7th officina, Constantinople (Istanbul, Turkey) mint, 336 - 337 A.D.; obverse VRBS ROMA, helmeted bust of Roma left wearing imperial mantle; reverse GLORIA EXERCITVS (glory of the army), two soldiers standing facing, flanking one standard in center, heads confronted, each holds a spear in outer hand and rests inner hand on grounded shield, CONSZ in exergue; rare; $27.00 (23.76)


City of Rome Commemorative, 347 - 348 A.D.

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This type is likely the result a mint error, mismatching obverse and reverse types. This votive reverse was used for Constans and Constantius II and was probably not intended for use with a city commemorative obverse.
RL91933. Billon reduced centenionalis, cf. RIC VIII Heraclea 56, LRBC 965, SRCV IV -, VF/aF, on a small flan, weak reverse, encrustation, weight 2.235 g, maximum diameter 13.9 mm, die axis 180o, Heraclea(?) mint, 347 - 348 A.D.; obverse VRBS ROMA, helmeted bust of Roma left wearing imperial mantle; reverse VOT / XX / MVLT / XXX in four lines with laurel wreath, SMHB(?) in exergue (off flan); scarce; $24.00 (21.12)


Valens, 28 March 364 - 9 August 378 A.D.

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In 373, Valens converted to Arianism and ordered the persecution of orthodox Christians.
RL88742. Bronze centenionalis, cf. SRCV V 19752, Cohen VIII 11, VF, interesting double strike, dark green patina, weight 2.211 g, maximum diameter 19.5 mm, die axis 180o, 24 Aug 367 - 17 Nov 375 A.D.; obverse D N VALENS P F AVG, pearl-diademed, draped, and cuirassed bust right, from the front; reverse GLORIA ROMANORVM (glory of the Romans), emperor walking right, dragging captive with right, labarum (chi-rho Christogram standard) in left, ∆ right, [...]TES[...] in exergue; $10.00 (8.80)







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Catalog current as of Saturday, September 21, 2019.
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Mint Errors