Sorry - wrong name. Here's the link:

http://www.vintagezildjians.com/zildjian-stamps

It's a bit more fluid than that. People outside still referred to it as Constantinople for a long time and Turkey began to pressure outside nations to call it Istanbul late in the decade. I'm guessing that this is at least part of the reason that K Zildjian cymbals made for export (all of them?) sported "Constantinople" till somewhat later.

Great drummer I ain't but history teacher I am.

https://www.nationalgeographic.org/thisday/mar28/istanbul-not-constantinople/

Pete

Thanks, I have Rob Cook's book as well, but I know you've mentioned having updated a few things over the years and wanted to check. I printed my copy of your timeline from Cymbalholic back in April 2005. Thirteen years is a long time.

That is a very poor site for referencing vintage stamps. Only a few examples and little descriptive information. I'm still not sure how you came up with 1928. There was only one example of a vintage Istanbul K. After a quick check it looks to me like a Type IIIb old stamp, which to your eyes might look similar to the one you own if you're not aware of the details. In any case the Type IIIb old stamp was from 1953-1956. As is usually the case with such things, the devil is in the details.