Welcome to CT!! Always look over your 1964 Kennedy's carefully. There are plenty of DDO's (Doubled Die Obverse) as well as RPM's (Re-punched Mint Mark) to look out for.
And some people forget the 1970 was an “in mint sets only” coin. Even more forget that the 1987 Kennedy halves were also.
Don't forget that the 2001 and forward were never released for circulation. They are known as NIFC's (Not Intended For Circulation) by the roll hunters. Some keep them, I never did..
I may be biased but in general Denver makes a better overall quality product than Philly. And San Fran makes them better than Denver.
We could rotally start a coin gang! The DNDWC - Doubled Not Double Wreck-it Crew. Instead of walking around holding our junk, we walk around holding a sack of nickels. It's fool proof.
Also, starting in 1992 the mint resumed making 90% Proof Sets. So there are 90% silver coins out there, they are just proof.
Thank you for contributing to my answer, it was your normal nonsense reply. We had a new person to coin collecting start this thread and they may not have been aware of the silver coins in the 1992 on Proof Sets.
Not that cool, before 1965 it was just normal, there wasn't anything else. Silver coins were nothing special and if you got too many of them you could get rid of them for paper at face value. And the government kept telling us there was no reason to hoard the silver coins because they would co-circulate with the clad coins for decades to come. They were pretty much gone in less than three years once they stopped striking 90% silver coins.
What the 1992 silver sets had to do with this thread just evades me, if we're going to go all maximum serious. But then again, you MAY not know that the 1992-98 era is WIDELY known as the "Spaghetti Hair" era of quarters. But you should. It was so called because instead of actual relief in the coins, the Mint opted instead for nonsense spaghetti-like detail as a substitute. As bad as it was in 1992, the Mint made it even WORSE in 1995. They are the ugliest quarters ever.