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All Forums Category: General Numismatic Forums Forum: "Post Your..." Gallery Topics

Question About Unusual Coinage Materials/Post Your Unusual Materials Coins!

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Author	Replies: 278 / Views: 22,579	Page: of 19

nautilator Valued Member United States 266 Posts	Posted 07/03/2020 9:13 pm That's really neat about the niobium coin, I'll have to get that along with the polymer/metal ones they issued last year. A bit behind on modern things because of some recent purchases. For example... Yes, I got me one of those Polish sulfur medals. I might have a reliable way of getting more, if so I will make sure you can get one of them, CCC. I also got me a Poessneck black leather/gold gilt notgeld, 1923. These things are fairly common (and pricey) but this one is particularly nice. The gold leaf is commonly broken or damaged on these. Report this Post to the Staff
jbuck Moderator United States 89924 Posts	Posted 07/04/2020 01:06 am Very interesting! 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
casualcoincollector Pillar of the Community United States 538 Posts	Posted 07/30/2020 12:19 am So here are some interesting things that I came across recently. Pakistan made some Cadmium containing silver commemoratives in the 1970's and apparently the US mint kept really good records of what actively circulating world coins were exactly made of as part of the "Annual Report of the Director of the Mint" and I came across the 1951/1952 copy of that report on google and it seems that all of the Occupation Zinc coins from Norway during WWII had a .2% Cadmium content. As seen in the links below. http://www.chiefacoins.com/Database...Chaudhry.htm https://books.google.com/books?id=O...m%22&f=false Edited by casualcoincollector 07/30/2020 12:23 am Report this Post to the Staff
jbuck Moderator United States 89924 Posts	Posted 07/30/2020 09:51 am Thank you for the links. 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
nautilator Valued Member United States 266 Posts	Posted 08/07/2020 02:45 am Those director's mint reports look like they're really useful. I arbitrarily chose another one -- the one from 1959 -- and in it I see that Italian coins made of "bronzital" include 0.4% titanium in the alloy. I normally don't bother with anything less than 1% but there are probably some other hidden gems in there. Report this Post to the Staff
casualcoincollector Pillar of the Community United States 538 Posts	Posted 08/07/2020 03:16 am Thanks for the information on the Italian 20 Lire I hadn't come across that one yet. I hear your point on not including things that have less than one percent in the alloy but from my point of view if I plan on including plated pieces such as the chrome plated WWII Canadian Nickel, which definitely has less than one percent chrome I should also need to include the minor alloys provided that they have a metal that isn't represented somewhere else in the set and provided that it is not an impurity in the alloy. So, I will be adding a Norway occupation 50 Ore and a late 1950's Italian 20 Lire to my set. The titanium in the 20 Lire is definitely there by design and I believe that the cadmium in the Ore coins is also there by design since there are other zinc coins from that time period that do not list cadmium in the same report and cadmium is added to zinc to increase its corrosion resistance. Edited by casualcoincollector 08/07/2020 03:43 am Report this Post to the Staff
nautilator Valued Member United States 266 Posts	Posted 08/07/2020 10:05 am There's a lot there to be had. The 1959 report mentions that a number of South Africa coins had 2 or 5% manganese in them. Surprised me quite a bit as I thought our nickels were the only ones. Report this Post to the Staff
casualcoincollector Pillar of the Community United States 538 Posts	Posted 08/07/2020 3:47 pm It looks like the Italian "Bronzital" only contained titanium from 1957 through 1967 then the titanium was replaced with nickel in 1968. https://books.google.com/books?id=g...m%22&f=false Edited by casualcoincollector 08/07/2020 4:15 pm Report this Post to the Staff
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