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 TerybleVeteran Member
Posts: 316
Joined: 17 Apr 2008
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 Posted: Wed Jun 18, 2008 7:55 am |
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I believe I have a RPM, but do not see any listings that compare to mine? Thanks for input!
Teryble
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In the 60's, people took acid to make the world weird.. Now the world is weird and people take Prozac to make it normal.
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 DickExpert Member
Posts: 5780
Joined: 21 Sep 2006
Location: Rialto, CA.
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| Posted: Wed Jun 18, 2008 10:13 am |
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"Maxi", sorry, but I believe that would be a "zinc-RPM". The alloy, and the effects of the strike, etc, all combine to give that look very often. As it "ages", that MM will actually fall off.
Dick
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" Deja Moo: The feeling that you've heard this bull before".
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 coopExpert Member
Posts: 3402
Joined: 17 Sep 2003
Location: Arizona
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| Posted: Wed Jun 18, 2008 11:59 am |
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The plating of copper on the coin was torn while the coin was struck. This tear went throught to the plating and now the zinc is exposed and deteriating. First it raised and then it falls and eventually the mint mark will fall off. Just something that happens to coins that are zinc plated with copper.
_________________
Richard S. Cooper
You may be only one person in the world, but you may also be the world to one person.
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 KurtSSenior Member
Posts: 875
Joined: 15 Feb 2008
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| Posted: Wed Jun 18, 2008 2:19 pm |
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Coop--those are great, instructive shots!
Expansion-implosion. It looks like three steps of a underground nuke test. 
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coopExpert Member
Posts: 3402
Joined: 17 Sep 2003
Location: Arizona
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| Posted: Thu Jun 19, 2008 4:24 pm |
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I have found two 1983-missing D Cents. I checked to see if they were from the same dies, but they were. Must be the age/damage that is making them do that.
_________________
Richard S. Cooper
You may be only one person in the world, but you may also be the world to one person.
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