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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; $225.00 (198.00)


Byzantine Anonymous Follis of Christ, Class I, Nicephorus III, 7 January 1078 - 1 April 1081, Brockage Mint Error

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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.
BZ91208. Bronze anonymous follis, cf. Anonymous follis of Christ, DOC III-2, class I; SBCV 1889, VF, brockage error, weight 4.929 g, maximum diameter 22.6 mm, die axis 0o, Constantinople (Istanbul, Turkey) mint, 7 Jan 1078 - 1 Apr 1081; obverse Christ bust facing, wearing nimbus cruciger, pallium, and colobium, raising right in benediction, gospels in left, IC - XC (Greek abbreviation: Iisos Xrists - Jesus Christ) across field; reverse incuse of obverse (brockage), bust of Christ facing; normal reverse type: Latin cross with X at center, globule and two pellets at each extremity, floral ornaments in lower fields, crescents in upper fields; $180.00 (158.40)


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 (114.40)


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)


Gallienus, August 253 - September 268 A.D.

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Liberalitas coin types attest to occasions when the emperor has displayed his generosity towards the people by a distribution to them of money, provisions, or both. The first mention of Liberalitas was on coins of Hadrian. It was a type frequently repeated by the succeeding emperors. Indeed these instances of imperial generosity are more carefully recorded on coins than they are by history. Liberality is personified by the image of a woman, holding in one hand a counting board, or square tablet with a handle on which are cut a certain number of holes. These boards were used to quickly count the proper number of coins or other items for distribution to each person. In the other hand she holds a cornucopia, to indicate the prosperity of the state and the abundance of wheat contained in the public graineries.
RL88748. Billon antoninianus, Gbl MIR 645a var. (LIBERTAS), RSC VI 585 corr. or var. (LIBERITAS, left hand "hanging"), RIC V-1 -, SRCV III -, F, a little rough, porous, light earthen deposits, weight 2.786 g, maximum diameter 19.7 mm, die axis 0o, 5th officina, Rome mint, 265 - Sep 268 A.D.; obverse GALLIENVS AVG, radiate head right; reverse LIBER[I?]TAS AVG (appears to have an addtional I, in error), Libertas standing half left, head left, pileus (freedom cap) in right hand, cornucopia in left hand, E right; extremely rare; $30.00 (26.40)







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Catalog current as of Saturday, June 15, 2019.
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Mint Errors