Dr. Ilya Prokopov's Fake Ancient Coin Reports
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BOC_1990_News_4.jpg
Zenobia AE Antoninianus, RIC 27900 viewsObv:- S ZENOBIA AVG, diademed and draped bust right on a crescent
Rev:- IVNO REGINA, Juno standng facing, head left, holding patera in right hand, sceptre in left, peacock at her feet; star in left field.
RIC 2.
3.01g

Published in the IAPN BOC Vol 15, No. 1 in 1990 - Example 4
Image used with permission of IAPN
maridvnvm
Zeno.jpg
Zeno, Gold Tremissis7113 viewsObv:- DN ZENO PERP AVG, Diademed, draped & cuirassed bust right
Rev:- Cross within wreath; COMOB in exe
1 commentsJoe Sermarini
SS_-_Mold_seam_and_sprue.jpg
Evidence of Casting - Sprue and Edge Seam4548 viewsIt was described on line as a Septimius Severus, silver drachm. The original is one of the die pairs listed AMNG I, 1, no. 1354. It is a silver simple 2-mold cast of an AE 18-19 of Nicopolis ad Istrum. This coin is reported in Roman Provincial category. The face of Apollo on the reverse was "improved", there is a seam between the two halves, and evidently a sprue, as well. Contributed by P.L. Patricia Lawrence (slokind)
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Evidence of Casting - An Example with Obvious Casting Flaws4002 viewsClick to see a larger image of an extreme example to help new collectors understand what soft details, etc. mean. All features are rounded. Nothing sharp. Everything blends into fields without distinct edges. It is fairly obvious the pits are not corrosion, but from air bubbles in the liquid metal. Even though the edge has been filed, there is still a trace of the seam. Posted on the boards by peterhill.
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zzz Griechische Münze Objectnummer: 1400141990433788 viewssold on ebay by mobile_aktuell on 08-aug-06 for Euro40.50epmunt
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Abdera3744 viewsObv: - Griffin seated l.
Rev: - ΑΒΔΗ / ΡΙΤΕΩΝ either side of laur. hd. of Apollo r.
Greek Stater of Abdera copy
mihali84
flow.jpg
Evidence of Pressing - GENUINE COIN - Strike Flow Lines (example on a genuine coin)3394 viewsThis is a genuine coin. Many modern fakes are not hand struck. They are pressed using a hydraulic or screw press. These presses compress the planchet and force the metal to fill the die just like striking, however, the process is slower and usually done with an unheated planchet. Striking by hand (particularly silver and with heated flans) results in metal flow lines as seen on this coin inside the red circled areas. A coin struck with a new fresh unused die will not show flow lines. The lines are actually worn into the die by flowing metal. The more worn the dies, the larger the flow lines you might expect to see. The dies used to strike this coin still have good detail but the flow lines are already fairly strong. This is fairly typical for the time period and is probably related to mint techniques of the era. Many genuine coins do not have flow lines as obvious as this coin, however, this coin is a good example for study. These lines are usually missing on pressed fakes and are often missing or reduced on cast fakes. Joe Sermarini
Otho~0.jpg
Evidence of Casting - Comparison with Genuine Struck Original3350 viewsThe top coin is a cast fake. The bottom coin is an original struck coin. The genuine coin is sharp. No amount of wear could make the genuine coin look like the cast coin. The lack of detail on the cast coin is not wear on the high points; it is everywhere. The raised bubbles in the fields (nicknamed "pearls") are another indicator of casting. Joe Sermarini
bpDioForgery.jpg
Evidence of Casting - Edge Filing3106 viewsFew examples of edge filing will be this obvious. Often there will be just a small area of filing that the forger missed in his later finer smoothing efforts.
6 commentsJoe Sermarini
tranianus_normal_edge.jpg
Evidence of Casting - GENUINE COIN - Study Image of Edge Crease to Compare With Casting Seams2989 viewsSometimes when a coin is struck the metal on the edge folds or forms a crease. This picture shows a normal edge fold or crease, which looks a bit different from a casting seam. The coin is genuine.
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zzz Griechische Münze ebay Objectnummer: 1400141905882988 viewsMorden cast.

fake seller : mobile_aktuell sold on ebay.de.

08-aug-06
epmunt
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Evidence of Casting - Apparent Wear That Isn't Wear2940 viewsA cast Alexander the Great drachm and a cast Tiberius denarius "Tribute Penny." Both exhibit the typical soft edges and missing details of cast coins. While both superficially appear to be worn, the wear is equal on the high points and in protected recessed areas, which is impossible. There are no actual indications of circulation - tiny bumps and scratches.Joe Sermarini
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Evidence of Casting - Missing Details That Were Off-Flan on the Coin Used to Make the Mold2934 viewsThis is a pressure cast forgery made with molds created using the lost wax method. First a mold is made using a genuine coin. Copies are made in wax using that mold. The advantage of making wax copies is that the edge rim is easily removed from wax. In addition, small changes can be carved in the wax and new flan edges and shapes can be created for each copy. These wax coins are then used to make new molds each of which is unique and does not have a seam. Instead of splitting the mold creating a seam, the wax coin is melted and burned out of the mold. The mold must still have a sprue (and usually two per coin). The casting is then done in a centrifuge to eliminate most of the air bubbles and other evidence of casting. This pressure casting is not completely effective because under a microscope the evidence of casting is still visible. This coin has an obvious sign. The crest of Athena's helmet was off the flan on the original genuine coin used to create the first mold and wax copies. The forgers made the flan of this fake a little larger than the original in the area above the helmet from 9:00 to 12:00, but the forgers did not recognize this area of the flan should not be featureless and flat. It should have the more of the helmet's crest, which is visible only from 8:00 to 9:00.
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Evidence of Pressing - Lacking the Imperfections of Hand Striking2677 viewsMany modern forgeries are not hand struck, they are machine pressed. Pressed coins normally have strangely flat fields, a lack of flow lines, no doubling, no slippage, uniform strike (no flat areas), and uniform thickness. Often these coins are also very well centered. Slavey coins are pressed (to see more pressed coins use the search function and search for Slavey).
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ACARNANIA, ILLIRYA AND CENTRAL GREECE2595 viewsAR Stater 24 mm.
Obv. Beardess hd. of river-god Acheolous r.
Rev. Apollo Aktios enthroned l., holding bow in r. hand; in l. field two monograms.
Struck. Die-engraver "Slavey Studio - Haskovo I"
Published: Sofia 2003, no.110

Ilya Prokopov
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Late Roman bronze coins2571 views7 late Roman bronze fakes from YugoslaviaMarius
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Evidence of Casting - Cast Fake or Genuine Original?2553 viewsSharpness in some areas looks more struck than cast. Overall, it certainly has the characteristics of a cast. Sometimes, however, these characteristics also result from wear and corrosion. Most likely the authenticity of this coin could be determined quickly in hand. But sometimes it just isn't possible to determine if a coin is genuine, especially from a photo alone. Our recommendation is simply not to buy coins like this from anyone except the most reputable dealers. Note: This coin IS fake.Joe Sermarini
What do you think about this Hadrianus.jpg
Artificial Patina on Forgery - Skillfully Applied2547 viewsThe artificial patina on this forgery was skillfully applied. An artificial patina is often helpful in detecting forgeries. Fortunately most do not look as natural as this patina. This patina would be difficult to detect as artificial on a genuine coin. We know it is fake because the coin is fake.

Often artificial patinas are created by replicating (but speeding up) the actions of nature. Chemically they may be identical to a patina produced by nature. But nature usually creates more variables than a person slapping on chemicals. A natural patina usually has more variaiton in color and texture.
Joe Sermarini
RRD-DD.jpg
Аnonymous-prow2531 viewsAR Roman Republican Denarius 187-155 B.C.
Obv.: Helmeted head of Roma r., X behind.
Rev.: The Dioscuri galloping r., with prow below the Dioscuri. ROMA below.
Cast.
Ilya Prokopov
volteia-cast.JPG
Volteia family cast denarius fake2459 viewsSold on Ebay in Feb. 2005 by seller numistrader as guaranteed genuine.

submitted by rupert
1 commentsRupert
Alexander tet img.jpg
zzz Alexander the Great, Alexander III, silver tetradrachm2458 viewsAR tetradrachm ???

Cast fake.

Sold on ebay January 2007 by batibaleno.

Submitted by Maridvnvm
maridvnvm
Alexander Tet 6 obv.jpg
zzz Alexander the Great, Alexander III, silver tetradrachm2391 viewsAR tetradrachm ???

Cast fake.

Sold on ebay January 2007 by batibaleno.

Submitted by Maridvnvm
maridvnvm
Alexander obv.jpg
zzz Alexander the Great, Alexander III, silver tetradrachm2247 viewsAR tetradrachm ???

Cast fake.

Sold on ebay January 2007 by batibaleno.

Submitted by Maridvnvm
maridvnvm
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M Tullius 120 BC denarius2211 viewsM Tullius minted 120 BC denarius
RCV 155, RCC280/1, RSC Tullia 1 3.07g
Helmeted head of Roma right with legend ROMA
Victory in quad Riga holding palm branch, wreath above, X below with legend M.T.VLLI

Notice blobs of metal, bubble pits, file marks, soft features
1 comments
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