I have a 20 inch K zildjian Istanbul ride for sale. As far as I have been able to piece together it has an older stamp from the 40's. It has been keyholed and there are a few cracks around the keyhole, but I've been playing it for 8 years and the cracks haven't moved a milimeter. There are also a few small knicks around the edge. This cymbal has the best sound of any I've ever heard,It is so dark and moody but with a great musicality to it. I haven't been able to weigh it but I believe it is medium thin, you can crash anywhere on it even the bell. I'm looking for around $1200, but being as I can't find any comparable cymbals for sale I'll take any reasonable offers, don't be stupid and waste my time and yours with bad offers. If your interested I can send you pictures and a sound file of it. E-mail me at AndrewMcAlpin@gmail.com or call (845) 807-6671 anytime after 3pm EST.