Ok this one is missing the copper coating on both sides and cupped with no visible damage to either side.(besides a small corrosion hole above the ear on the obverse) The edge of the coin is interesting as well with no visible damage! Weighing 2.4g. I've gone round and round on this one so I thought I'd post it and see what you guys thought! Thanks
A combination of chemical and mechanical damage. The plating was chemically stripped and the coin was apparently circumferentially compressed in the horizontal plane, producing an edge like a bicycle tire rim and a convex/concave cross-sectional profile.