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1970-D Penny Very Off In Color And Sound Sounds Higher Pitched When Spun On

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United States
50760 Posts
 Posted 03/09/2021  09:52 am  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Acid can thin a coin a lot:




Richard S. Cooper
Some have asked about my images I use and I'm glad to say, you can now you can see the DVD in sections on youtube:
1. Intro, older coins, toned coins 2. Doubled dies 3. Die events, One of a kind errors 4. So called errors, Coin information 5. Coin information Types and Varieties, Overlays
Jefferson nickel doubled dies Wexler/Rebar complete listings

trail dies:http://www.traildies.com/
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United States
31 Posts
 Posted 03/30/2021  3:00 pm  Show Profile   Bookmark this reply Add Adam C vance to your friends list Get a Link to this Reply
I finely have my scale back here is the weight of the 1970 d penny
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United States
647 Posts
 Posted 03/30/2021  5:42 pm  Show Profile   Bookmark this reply Add lcutler to your friends list Get a Link to this Reply
Just slightly underweight, supports the acid damage.
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Canada
736 Posts
 Posted 03/30/2021  6:21 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
@ Tanman2001.

Your name of gliding metal is the old name for this kind of tombac. Even the what you look ( Wikipedia ) will give you same name like the alloys metallurgical books "enameled tombac" which are use today.

Your old name and the modern name are synonyms. Personally I use the last names but accept the old also because is hard to change people to the new nomenclature.

I give you here the specs of this alloy (you can check if I am wright):
ASTM B36, a cold roll alloy, yield 50Ksi, tensile strength 56Ksi, elongation on 2 inch 5%, hardness (Brinell scale)114

Hope at your satisfaction

Silvio

PS the wright way to say on collecting will be just: tombac, brass and bronze.
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