1982 D Zinc Large Date 1c
Hey everyone, sorry if this is a silly question, but I need two more cents for my Lincoln album, and every time I come across an 82D Large date and do a ping test its always copper. Is there something that I might be doing wrong that maybe makes the coin do a high pitched ping because it seems insane how uncommon the zinc 82's are. At school I test composite doing ping tests so I think my ears are keen to the sounds but it feels like I'm going crazy with how many rolls I'm searching without the zinc 82 cents. Any tips are appreciated, and I apologize if this has been asked before. Thanks guys.
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