I have a vintage K Zildjian set of 15 inch HI Hat cymbals, top and bottom set. These cymbals have no cracks or key holes. I have owned them for over 30 years and they have plenty of patina because I never cleaned them, so the stamp and markings are very clear. These cymbals have great response and sound, they are the best ever made. I have pictures of them and the stamps to prove they are real. I am looking to get $1000.00 for the set plus shipping. These are very rare and even on this site I have only seen one set listed and it sold quickly.