Dear Zenstat,Wow. Thanks for your in-depth reply. I will get in touch with your cymbal repair man. I do love the feel and color of the old cymbal. Btw, I take it the medium stamp means it's a medium weight cymbal.Thanks.
Yes. It may be that it was Gretsch (the USA distributor) who put those MEDIUM ink stamps on once they came to the USA. Drumaholic (Bill Hartrick) is the expert on these old Ks. I'm just letting people know of some experiments which are probably of general interest to the vintage cymbal community.