I'd be curious too because I'm always looking to improve my site in terms of ease of use. Yours looks like a 1960s short stamp including the quirks of that particular die. It also matches the bold/not bold distinction in terms of the ZILDJIAN Co (bold) compared to the AVEDIS and the Ottoman section.
[img]http://black.net.nz/avedis/images/15-914-short-60s-rule.jpg[/img]
I'd love to know what you felt didn't fit the pattern, and what the other trademark stamps were which you thought yours might be. What was it close to?
The other thing to note is that there is an overemphasis on considering the trademark die stamp in identifying production period. Once you know what to look for, a glance at a cymbal's lathing and visible hammering patterns will tell you it is 1960s or not. I've covered hammering and lathing on my site, but my site started off with trademarks because that's what everybody seemed to base identification on. So my site still looks trademark focused even though that's less than half of the story.
Also a note for general readers who might find this later: the others sites you mention (hidehitters.com, vintagezildjians.com, robscott.net) are not maintained and are years out of date, as well as incomplete in their coverage of just what details to look for to tell different stamps apart. They don't even have all the known stamps, and contain misinformation about the ones they do have. Yet nothing gets corrected. But then I would say that wouldn't I? :)
Where you might be able to help me is whether or not my site is too comprehensive to take in. Is being comprehensive, data rich, and accurate actually a handicap? I'm experimenting with other approaches so I'd love to know what you think.