It most likely took a hit that broke the plating and that is a bubble created from underlying zinc rot - just damage.
Edit: I just noticed the rim looks odd near IN G. Are my eyes playing tricks on me?
In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
Edited by spru
03/08/2017 7:02 pm