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Replies: 29 / Views: 3,830 |
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Pillar of the Community
United States
1666 Posts |
Are the counter-stamps modern, or were they done in the period (not necessarily the same period)? The edges look awfully rough for the supposed age. I have a late 1890's 8r with counter-marks and the edges are worn much finer than this. Thanks for another intriguing lesson on counterfeits. =)
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Pillar of the Community
 United States
5362 Posts |
jfransch - you asked about the weight and could the forgery be determined by weight.
You need to do a Specific Gravity to detect the fact you are dealing with GS. The weight is easily adjusted by making the coin slightly thicker than it should be.
Numismat I believe the counterstamps are MODERN, but they could be a few decades old. The 1959 article on forged YII stamps did not indicate a modern fake with a closed circle of dots - so the counterfeit stamp must have been made after 1959.
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Pillar of the Community
United States
1666 Posts |
Thanks Bob, I'll keep the information in this post for later reference. I'm surprised you haven't written your own reference book yet. =)
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Pillar of the Community
United States
5318 Posts |
Hey, if this helps--I looked up the specific gravity for GS: ~8.5, which is quite different from "coin silver": 10.31 or sterling: 10.36. Here Swamperbob wrote a method for measuring specific gravity, which I adapted to a simple pocket scale/harness setup--it works! 
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Pillar of the Community
Spain
1361 Posts |
The coin is contemporary fake as it is obvious especially with the trial cut and the numerous chopmarks to test authenticity, but since it is made of silver it circulated well. The Philippine countermark seems to be an authentic one 1835 (5-4-2 pearls) but since these countermarks are notoriously forged in a very good way I would side more on swamperbob as he knows more on the coin origin. Quote: Therefore, because the forgers used GS - you can date the manufacture of the "1834" host to sometime after 1837, which makes the YII counterstamp a forgery. This in turn means that the other counterstamps used on this particular coin are also forgeries.
The siam or thailand countermark seems a lot different from the Chakra and Mongkut c/m, but I'm not an expert on this.  Check my website on Philippine countermark Fernando 7º and Isabel II
Edited by manila galleon trade 12/10/2008 07:26 am
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Pillar of the Community
 United States
5362 Posts |
I agree totally that the stamp looks real, but it is real for 1835. The fact it looked real was why I was initially very interested in this coin. The host is definitely counterfeit and if the stamp was real - it would fall in a very rare class of "officially" recoined counterfeits. I own VERY few as they are really rare. The price of $331 would actually be low if the stamp was real.
However, fortunately for me - the host here is my favorite counterfeit type. I have owned one or more of these "Chicken Eagles" since I was 12 years old. Right now I own 56 different copies of that particular coin. I am very familiar with the way the dies deteriorated and I can state without fear of contradiction that based on the wear to this die pair that the coin is German Silver not Debased Silver. By the time the dies looked like this the counterfeiter had turned to GS for planchets. I have never seen a debased silver copy of this coin with that amount of wear. The silver copies are very scarce and they are very early die states.
If you notice the superscripts on the Z, D and G you will see that the s's no longer look like s's. They have already turned to rectangular blobs. In addition the star in front of the 8R is already deformed. As I stated earlier, the forgers kept recutting this die pair to "help" the image.
I believe the coin circulated successfully during the Hard Times because many people believed it really was silver. This false impression was bolstered by the publication of Riddell's Monograph in 1845. Riddell initially intended his book as a sort of REDEMPTION guide for counterfeits. For each coin he published the silver content so that debased coins could be redeemed at a discounted intrinsic value. He lists the #237 as having a value of 70 cents. Of course if the counterfeiters knew this - they could reduce the silver content. Which I believe they did. Riddell's book as a redemption guide was a dismal failure - but to establish a time line for the dies it is an invaluable snap shot in time (1839-1844).
Also the way the Thialand stamp fractured the planchet - there is little chance this is a silver coin.
The date of the counterstamp provided by the table in the last post is great confirming data. The stamp date is 1835 - an that is proof positive that a GS counterfeit is impossible.
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Pillar of the Community
United States
819 Posts |
Swamperbob, I was wondering if I might use your discussion on this coin for the Chopmark Collector's club? I'm sure the discussion and sleuthing would be invaluable to a group of people who enjoy Chopmarks specifically.
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Pillar of the Community
 United States
5362 Posts |
No problem - you can use the discussion on the other forum and if you have any further questions or comments I would be interested in hearing them.
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Pillar of the Community
United States
819 Posts |
Thank you! I formatted the content into an email, and have sent it out to the person currently in charge. :) We hope to have a website up and running in the near future, but we're pretty much starting over at this point.
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Pillar of the Community
Spain
1361 Posts |
Is it a German silver or low grade silver coin? Quote: Therefore, because the forgers used GS - you can date the manufacture of the "1834" host to sometime after 1837, which makes the YII counterstamp a forgery. Quote: The date of the counterstamp provided by the table in the last post is great confirming data. The stamp date is 1835 - an that is proof positive that a GS counterfeit is impossible.
Nickel silver is a metal alloy of copper with nickel and often but not always zinc. It is named for its silvery appearance, but contains no elemental silver unless plated. Other common names for this alloy are German silver, paktong, new silver and alpacca (or alpaca). Nickel silver or German silver is first known in China, and was known in the west from imported wares called paktong or pakfong (literally "white copper") where the silvery metal colour was used to imitate sterling silver. According to Berthold Laufer, it was identical with khar sini, one of the seven metals recognized by Geber. It was discovered to be a copper-nickel-zinc alloy in the 18th century. In 1770 the Suhl (Germany) metalworks were able to produce a similar alloy and in 1823 a competition was initiated to perfect the production process by creating an alloy that possessed the closest visual similarity to silver. The brothers Henniger in Berlin and A. Geitner in Schneeberg independently achieved this goal. Alpacca became a widely known name in northern Europe for nickel silver after it was used as a trademark brand by the manufacturer Berndorf. A form of German silver was also invented in Birmingham, England in 1832. Nickel silver became widely used after 1840 with the development of electroplating, as it formed an ideal strong and bright substrate for the plating process. It was also used unplated in applications such as cheaper grades of cutlery.
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Pillar of the Community
 United States
5362 Posts |
It is German Silver - the examples I have tested using XRF show a very high percentage of zinc up to 30%.
The use of Nickel Silver and German Silver can be confusing. German Silver is an alloy WITH zinc. That is the critical difference.
It is the presence of ZINC that makes these counterfeits datable. "Nickel Silver" is a misnomer like British Silver which is an alloy of nickel and copper. Nickel silver was in use during the entire period but it was not normally seen is US and Mexican counterfeits.
The 1834 Riddell #237 started as a debased silver coin containing about 60% silver. This is the one that Riddell found in circulation between 1839 and 1844. Some (not many) early copies were also Sheffield Plate which is a fused metal sandwich of silver foil over a copper/Bronze or nickel core. There are a few copies struck in copper and bronze that were silver wahsed or tinned. But by far the highest number are struck in German Silver. German Silver because of the Zinc content shows NO FLOW LINES causing some people to call them cast. It (GS) is also not malleable which is why it cracks when punched.
GS when handled has a greasy feeling surface and does NOT ring. Both of those factors are caused by the presence of zinc.
Niclkel silver - has flow marks, is malleable and does ring although at a different tone. So the two metals are rarely confused.
Once you become familiar with these counterfeits you can spot German Silver rather easily.
Edited by swamperbob 12/10/2008 10:47 pm
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Pillar of the Community
Spain
1361 Posts |
Thanks swamperbob for the clarification. I have a number of countermarked coins and it is silver with crack due to the stamping. What can you say about this? This is very interesting and a topic to learn.
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Pillar of the Community
 United States
5362 Posts |
I am not saying it is impossible to crack a silver coin under pressure - it is just far less likely than with GS. I would also be suspicious of cracked coins. I would do a specific gravity to check.
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Pillar of the Community
Spain
1361 Posts |
Thanks swamperbob, very interesting topic
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Replies: 29 / Views: 3,830 |