Sapyx ✭✭✭✭✭

It is, from a certain point of view, "just a variety". However, it is only only considered a "major variety", but a major variety that has been included in every single penny albu… (View Post)

The anti-acetone crowd like to cite a few research papers showing that, under certain extreme conditions, acetone in contact with copper can break down and form acetic acid, which can cause corrosion… (View Post)

It's a vise job, or "squeeze job". The only difference here, is that this coin got "vised" by several different coins (or perhaps the same coin multiple times in different or… (View Post)

The bust, and the position of the date beneath it, are both indicative of Spanish-colonial coins (Mexico, Peru, etc). Specifically, I'm seeing the "big nose" of Spanish king Charles II… (View Post)

"Dipping" cupronickel coins is more problematic than dipping silver coins, as anything corrosive enough to remove stains and oxidation from the surface is also likely to be strong enough to… (View Post)