Used Zildjian K Istanbul "New Stamp" 18" Ride Medium Heavy
They made them a little heavier near the end of the Zildjian K istanbul era ('67-77).  This 18" weighs in at 1720g, great stick definition, great bell, complex overtones that sounds like a ride when you crash.  Nice hammer marks and lathing, no flea bites, the hole is slightly oval but not keyed.  It makes for a great small ride cymbal.