There are some surprising answers from posters that know the difference. Special Mint Sets were issued 65, 66, 67. Obviously the coin pictured is a '62-P. Now, the question regarding seeing the fields isn't going to give any clues regarding the presence of Cameo/non-cameo surfaces. Proofs at that time didn't have frosted devices and mirror fields (not all - very few had a cameo effect and sell for high numismatic premiums over other proofs). Proofs did receive special handling at the mint and consequently there are clues (sometimes) that are left behind due to this handling. The dies were polished by hand at the time for proofs. Business strikes didn't not receive the special treatment. As a result of the hand polishing, there was often lint left behind on the die. The presence of lint marks on early proofs are sometimes the only way to tell the difference from business strikes minted in Philly.
There are some surprising answers from posters that know the difference. Special Mint Sets were issued 65, 66, 67. Obviously the coin pictured is a '62-P. Now, the question regarding seeing the fields isn't going to give any clues regarding the presence of Cameo/non-cameo surfaces. Proofs at that time didn't have frosted devices and mirror fields (not all - very few had a cameo effect and sell for high numismatic premiums over other proofs). Proofs did receive special handling at the mint and consequently there are clues (sometimes) that are left behind due to this handling. The dies were polished by hand at the time for proofs. Business strikes didn't not receive the special treatment. As a result of the hand polishing, there was often lint left behind on the die. The presence of lint marks on early proofs are sometimes the only way to tell the difference from business strikes minted in Philly.
Sorry. Was carding SMS Lincoln's at that moment. It does appear to be a proof. Lol