1807 4r Potosi Counterfeit? - Coin Community Forum

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Author	Replies: 6 / Views: 1,190
thq Pillar of the Community United States 3343 Posts	Posted 01/20/2014 5:46 pm Despite having the correct worn weight of 13.2g, a good ring, and decent obverse appearance, I missed the following surprise on the reverse of this 1807 Potosi 4R: The casting bubbles along the RH pillar make it look like the aerator in an aquarium....caveat emptor.... "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire Edited by thq 01/21/2014 12:15 pm Report this Post to the Staff

Numismat Pillar of the Community United States 1666 Posts	Posted 01/20/2014 11:04 pm Are you sure that's not just die rust? Doesn't otherwise look to be cast. Report this Post to the Staff
thq Pillar of the Community United States 3343 Posts	Posted 01/21/2014 06:13 am There are an awful lot of bumps numismat, and they're all very regular in shape. I looked at a few other 4R's from the period and don't see this. I'd like to believe that it's a legitimate strike, and if someone has one that has bumps like these I'd like to see it. "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire Report this Post to the Staff
Numismat Pillar of the Community United States 1666 Posts	Posted 01/21/2014 06:32 am I have an Argentinian coin that has similar looking bubbles, but is not cast. Any sign of flow lines, maybe between the central design and rims? Edited by Numismat 01/21/2014 06:32 am Report this Post to the Staff
thq Pillar of the Community United States 3343 Posts	Posted 01/21/2014 07:43 am If there are flow lines they are microscopic. The surface of the coin has a uniform granular appearance. The squares and circles on the rim look authentic. For $30 I got a questionable coin - what I wanted actually - and maybe those bumps are the reason this 4R was in the junk bin and not in regular store stock. "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire Edited by thq 01/21/2014 07:51 am Report this Post to the Staff
colonialjohn Pillar of the Community United States 1757 Posts	Posted 01/21/2014 08:09 am Could be air entrapment bubbles created during the annealing process. Its not cast. The lettering is too sharp, it rings and has good weight. John Lorenzo United States Edited by colonialjohn 01/21/2014 10:38 am Report this Post to the Staff
thq Pillar of the Community United States 3343 Posts	Posted 01/21/2014 12:01 pm This string on occluded gas bubbles shows some examples of striking or post-striking surface bubbling similar to the 4R. http://www.worldofcoins.eu/forum/in...opic=20506.0 These are copper and zinc coins of fairly recent mintage though. Here's an example on a Morgan dollar, so it is seen in silver coinage. http://www.vamworld.com/Occluded+Gas "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire Edited by thq 01/21/2014 12:14 pm Report this Post to the Staff
	Replies: 6 / Views: 1,190

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