Per Error Ref, all 1979-D cents should show a broken mintmark punch (notch in lower left). But this one I have here does not. Any ideas?
Probably due to circulation wear. Try to share the information when you can. http://www.error-ref.com/broken-punch/
Here is a CoinTalk thread about it. https://www.cointalk.com/threads/19...le-of-broken-punch-mint-mark-fake-rpm.322653/
Thank you! I will start adding a source link. Doesn't it look like the proper mintmark shape is still there? There is wear on the mintmark surface, but the shape looks accurate still. I understand the theory and idea though.