Posted 07/22/2018 01:13 am
Quote:
Extreme Die Deterioration. Metal moves towards the outer rim, called "metal flow" causing this "proto-rim". It also has a bit to do with a higher pressure strike which was used as the dies were worn down so the design elements would be formed sufficiently when pressed. This is NOT considered an "error", just normal machining problems as parts age.
Extreme Die Deterioration. Metal moves towards the outer rim, called "metal flow" causing this "proto-rim". It also has a bit to do with a higher pressure strike which was used as the dies were worn down so the design elements would be formed sufficiently when pressed. This is NOT considered an "error", just normal machining problems as parts age.
Just Die Deterioration from a worn die. This is very common on the Lincoln Memorial Cents from the 1980's and 1990's. If you want to see even more extreme Die Deterioration, see my 4 weeks old thread here. http://goccf.com/t/322204Errers and Varietys.
