Sapyx ✭✭✭✭✭

PVC goo doesn't just "appear" out of nowhere. It essentially has to be squeezed onto the coin by prolonged direct physical contact with phthalate-laced PVC. Now, the goo might original… (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)

This is a good example of "this thread is useless without pictures". Because, as jmlanzaf said, "verdigris" is impossible to develop on silver coins, as it requires a copper-based… (View Post)

I suspect it is to a large extent directed by the numismatic calendar you are involved with. For example: where I live there is one annual coin show which has been running for a couple of decades, an… (View Post)

There's a ten-year-old PCGS promotional video on YouTube about how they grade coins. I assume it's authentic, since it pre-dates the age of AI-generated slop: https://www.youtube.com/watch?… (View Post)