Doesn't look proof. Did you verify if so? Proof would be a lot more reflective.
I wouldn't say it's a proof, though it is in pretty nice shape. Sometimes a coin is considered proof-like (PL) when a circulation issue has reflective surfaces similar to a proof
Read your Red Book. It should tell you how.
Very hard to tell from a photo. The details and high relief just do not come through.
Not a proof. If you can hold the coin at an arms distance away and see your reelection in it, then its a proof.
On this coin, the low surfaces do not look like mirrors. It looks like a piece of metal (; Thats where they differ from eachother.
Not proofs... ???
Yeh I know it’s a no mint mark. Mint marks were in obverse starting 1968
The 1960 if it has a mint mark will be on the reverse at the end of the building