One Of These 10 Cent Proofs Doesn't Look Like The Others.

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Author	Replies: 8 / Views: 992
MachinMachinMan Pillar of the Community Australia 1679 Posts	Posted 07/09/2023 12:40 am Does the 2005 look like a silver proof? Yes I know I should weigh it but I don't have access to a balance at the moment. Yes I know the pictures are small but I'm talking about the colour of the 2005 compared with the others. Report this Post to the Staff

publius Pillar of the Community United States 784 Posts	Posted 07/09/2023 01:19 am It certainly looks different. I admit to being flabbergasted when you say that you should weigh it — since the circulating cupronickel 10 cent coin is struck to the exact weight specification established for shillings late in the reign of George III (sixty-six to the Troy pound of metal), the decision to make silver proofs at a different weight is utterly beyond me. Report this Post to the Staff
OzCollection Valued Member Australia 126 Posts	Posted 07/09/2023 01:31 am Nice finds MachinMachinMan It does look a lot more white than the others. Maybe do the ping test on it, see if it rings when you tap it Report this Post to the Staff
Keith67 Pillar of the Community United States 5995 Posts	Posted 07/09/2023 02:36 am I would say it is silver. Try this https://www.coincommunity.com/colle...sue-test.asp Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21593 Posts	Posted 07/09/2023 04:36 am Australia has never issued clad coins, so a tissue will be of little use for the detection a sliver or silver clad coin. Although a comparative ping tone test will be useful to tell the difference between a solid silver proof coin and a solid copper nickel proof coin , this test is not necessary either. No sterling silver (925 fine) Masterpieces in silver sets were issued for the date 2005, however, 6500 sets of the RAM Decimal Pure (1000 fine) Silver proof sets were issued for the date 2005. It follows that if the coin in question is in fact composed of silver, it could have only come from a set broken out of one of the above mentioned 6,500 sets. Dealers have these coins available for sale at around AUD $15 or $20, if they are in their individual capsules. However, I have never seen a 2005 silver proof 10 Cent coin for sale, that has been removed from it's capsule, but such an occurrence is plausible. The coin in question is not in a capsule, and so it's weight can be investigated. A standard copper nickel proof or strike issued for circulation weighs 5.65 grams. The 2005 fine silver coins were issued with the same physical dimensions as their circulating counterparts, but were struck in pure silver, and since pure silver is 17 7 % denser than standard copper nickel coinage alloy, 2005 pure silver proof 10 Cents should weigh 17.7% greater, at 6.65 grams. As an aside, the denser silver coin will have a lower ping tone pitch, but this test is not necessary if you have scales accurate enough to detect the 17.7% increase (1.00 grams) in weight. Many happy investigations ! Report this Post to the Staff
publius Pillar of the Community United States 784 Posts	Posted 07/09/2023 2:23 pm Quote: Australia has never issued clad coins, so a tissue will be of little use for the detection a sliver or silver clad coin. So far as I can see, whether or not a coin has a core of a different material than the surface cannot be evaluated by the " tissue test". It may be of help in distinguishing a silver surface from a cupronickel surface, and the Australian decimal coins are made of the very same 75/25 cupronickel alloy as the surfaces of US clad coins. Of course the latter are most easily distinguished by the visible copper on the edge. Report this Post to the Staff
jbuck Moderator United States 157664 Posts	Posted 07/10/2023 10:58 am Interesting find! Quote: It may be of help in distinguishing a silver surface from a cupronickel surface, and the Australian decimal coins are made of the very same 75/25 cupronickel alloy as the surfaces of US clad coins. I agree. Coin Collector Since 1978 My Avatar My Old Avatar My 7070 My Eisenhower Dollars CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
gxseries Pillar of the Community Australia 3675 Posts	Posted 07/10/2023 4:27 pm Did the coin come out from circulation? Would be surprised if that went through the machines as I thought they are calibrated for weight and size. My partial coin collection http://www.omnicoin.com/collection/gxseries My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm Regularly updated at least once a month. Report this Post to the Staff
MachinMachinMan Pillar of the Community Australia 1679 Posts	Posted 07/12/2023 04:17 am Quote: Did the coin come out from circulation? No, I bought a sheet of proof 10 cent coins back when you could find bargains on ebay. Cost me less than $2 a coin. Haven't really looked at them closely until now. Report this Post to the Staff
	Replies: 8 / Views: 992

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