gringo, you'll find member who'll give you some pretty good insights. We are a friendly and knowledgable bunch. It may take a little pAtience. Hanging out here you will learn tons and see some pretty cool coins.
Anyone what's PMD? I see this term alot. I know the m is for mint, but the rest stumps me.
Or, it possible an alloy mixing error. I have handled a similar piece in the past, that unfortunately, was harshly cleaned - however, the harsh cleaning did make it easier to decipher.
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer
SPP that is an interesting nickel, very cool. What is struck through a copper flake and how does it happen? You'd think the different metals don't get mixed up? I would of though yours was some weird discolouration. However you've got equipment and know how to do tests. I'm glad you posted some pics.
There is a few things going on with the OPs coin I agree. I'm not suggesting the OPs coin is PMD, the Obv got my attention more than the Rev, Sintered planchet it may be. The pics I posted are of fountain coins that have reacted with each other while in water with bacteria and algae reducing chemicals over time. Just for comparison I bought the first bag long time ago just to see whats in it..300951026181 Here's an awesome link on how to clean those heavily tarnished coins (dont try this for your good coins)...CLR
I would be happy to test it for you. But, there is a catch. You have to be a bit more active on the coin forums here on CCF, with posts of substance, because you will need 50 posts before you will be able to send me a personal message....
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer
@ SPP Ottawa what does your special machine do? I've had a life long fascination with rocks. I used to keep 300lbs in my 5th floor apt. Now I'm near the Rocky Mountains I can search to my hearts delight. Part of my flower garden contains my treasures, not to mention scattered rocks around the house. I was always curious about your machine. Can it be used to detect fakes? Sorry for all the noob like questions!!
It is a X-ray fluorescence (XRF) spectrometer (you can Google that to your heart's content)... basically, it is using an X-Ray beam to analyze the surface composition of anything (including coins); it is a non-destructive technique.
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer
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Posted 12/06/2014 3:45 pm
gringo, you'll find member who'll give you some pretty good insights. We are a friendly and knowledgable bunch. It may take a little pAtience. Hanging out here you will learn tons and see some pretty cool coins.
