I want to know if a 1968
Washington quarter should have a mint mark?
If yes, is it on obverse or reverse?
I am referencing my 6th edition
CherryPickers Guide pg 407 it lists the '68 Quarter with MM's?
Oooops! I just remembered

Coins minted in Philadelphia didn't have a mint mark for a period of time..... well it seems as though
I have answered my own question?
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