Zildjian A Hi-Hat Cymbals 1960's Vintage
These 1960's era Zildjian A Hats have the 1-1/2" tall stamp with 3 dots. They are 15" in diameter.
The top hat weighs ~953 grams and has some very slight keyholing.
The bottom hat weighs ~1483 grams and has some extremely slight edge damage for about 1" (see pics)