I know nothing about coins but I will do my best to describe this quarter which has a number of errors.                                                                                                                                              

On the reverse side: “UNITED” run into to rim and the “ST” in STATES runs into the rim AND both letters have extra metal on the top of each letter as well as the rim edge running through the extra metal (photo 3).

On the front side: “LIB” of Liberty run into the rim. Plus the "I" and "B" have extra metal (the "I" on top portion and the "B" along the bottom - Photo #5) .  Following 1970 there is a spot that looks like an “O” or zero (use magnifier) and is either an impurity in the metal or a stamping error (Photo 4).