Question About Coin Strike

A normal circulation coin is only struck once. A proof coin is carefully struck more than once, with the same die.

Banknotes can be printed in multiple stages, but a coin has to be struck "all at once" with the complete design from a single pair of dies. Otherwise, the designs on the second pair of dies would completely flatten and obliterate what had been placed there by the first striking.

Elaborate edges (eg on the President $1 coins) can be a separate stage, as this has no effect on the obverse and reverse.

As coppercoins said in that other thread, they're rim Cuds. A tiny piece breaks off the edge of a die, causing a raised blob of metal to appear there on coins subsequently struck by those dies.

I have no idea if it's a common effect on US proof coins. I'd have imagined not, since proofs are supposed to be highest quality. But CC says they're "normal". If that's normal, maybe the US Mint needs to lift it's quality control standards.

Of course, you could always return them to the US Mint as "defective merchandise", if you don't like them...

But it doesn't have anything to do with the topic of this thread.

Hi guys I was just asking because of the 1995 w ASE error, the coins/die must have gotten past quality control and the lettering liberty and united states of america on all coins are different thanks for the knowledge and have a great week !