1955 NGC PF66 Washington Silver Quarter (1). Beautiful proof quarter. 1955 Proof Washington Quarter Graded PF66 By NGC. 90% silver coin! Quarter may have the start of some toning and/or tarnishing. I know I've seen a slight color difference other than just silver. Coin slab has very minor scuffs/scratches but i couldn't find anything of real notice or too serious. I believe the pictures with flash show the light scuffs on the obverse side of the coin slab. Shipped with USPS First Class. Thanks for looking.