1973 No mint mark Aluminum Penny

Discussion in 'What's it Worth' started by jowaters, Jan 30, 2012.

  1. Michael K

    Michael K Well-Known Member

    Yes I understand. What about those 2 black spots on the reverse?
     
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  3. Razz

    Razz Critical Thinker

    Copper is the most reactive of rhe metals used for US coins. Who knows what causes those black spots on silver and copper? Some think it could be leaching of improper alloy mix or maybe it is spittle and just on the surface.
     
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