These just came up on ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120473025546&_trksid=p2759.l1259
I bet Drumaholic could answer this question with his eyes closed. So are these actually K's? I'm suspicious for several reasons:
1. - No English in the stamp. Not even "K. Zildjian & Cie". Which would make these SUPER old if they were actually Ks.
2. - The "signature" on the back says, "Made in Turkey" which makes me think this is from a different maker.
3. - This portion of the stamp doesn't look like any portion of any K stamp that I have. Furthermore, he stamp looks really clean. It doesn't look as if it has been worn down over time which would account for why it wouldn't look like any part of a K stamp.
I'm not saying these are bad cymbals. I have a few no-names that sound really nice actually. I just have my doubts that these are actually a pair of Zildjian plates.