1909 "silver" Jamacian Penny - Idea's

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Author	Replies: 6 / Views: 1,241
moose59 Pillar of the Community United States 732 Posts	Posted 12/06/2019 6:03 pm I went to a local coin shop to day and purchased some coins. One of them was this 1909 "silver" penny. Now a regular penny from Jamaica is copper/nickel, weighs 8.1g and is 30.9mm. The one I purchased is 9.3g and 30mm. Not a huge difference but enough. Report this Post to the Staff

Spence Moderator United States 34440 Posts	Posted 12/06/2019 8:30 pm Hmm, are you thinking that it has been plated? "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
moose59 Pillar of the Community United States 732 Posts	Posted 12/06/2019 10:01 pm Not really sure. I will be taking it back and seeing if he can put it on his testet Edited by moose59 12/06/2019 10:02 pm Report this Post to the Staff
Spence Moderator United States 34440 Posts	Posted 12/07/2019 04:33 am Ok yes good idea. I'll be interested to see what metal is on the surface of this coin. "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 12/07/2019 07:28 am I feel reasonably confident that this coin has not been plated. The extra mass of 1.2 grams is much more than be accounted for, with plating. I would also find it reasonably difficult to explain why a white metal alloy coin should be plated with a white metal. I would expect that XRF testing would reveal a standard alloy of 75% copper, 25% nickel for this coin. Weight needs to be re confirmed on a different accurate mass balance. If correct, I suspect that a wrong planchet was fed into the coining press. This happenstance is not unique; it happened (rarely), when The Royal Mint was executing coin orders for many countries around the British Empire. It still happens occasionally, although less often. Report this Post to the Staff
tdziemia Pillar of the Community United States 7963 Posts	Posted 12/07/2019 1:13 pm Very interesting. Agree that 15% difference in mass, if correct, is way too much for plating, but is exactly right for the difference between cupronickel alloy and silver. Edited by tdziemia 12/07/2019 1:15 pm Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 12/08/2019 05:26 am The possibility that it may be silver needs to be investigated. XRF would reveal the presence of silver or not. Report this Post to the Staff
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1909 "Silver" Jamacian Penny - Idea's