A timeline for Sabian will be part of the Cymbal Wiki
http://www.cymbal.wiki/wiki/Sabian
but for now there is only a stub.
http://www.cymbal.wiki/wiki/Sabian
I have a lot of information and lots of new discoveries since 2013 when this thread was started. I'm looking for somebody who writes well and knows the Sabian history and product lines to lend a hand. Send me a PM if you are interested. I would get to it eventually but I've got a lot of other things which have a higher priority for me. Like getting a better timeline of K Zildjian Istanbul up because RobScott has gone offline. I got the early K Zildjian & Cie Constantinople end up so people have something to refer to, but again I've got a lot of research and a lot more detail to add.
http://www.cymbal.wiki/wiki/K_Zildjian_Istanbul_Timeline
Cymbal.wiki started as a project to recover the original Paiste-Only wiki and I wanted to build on that style to cover other brands.
As far as the ink on those early Sabian cymbals goes the MEDIUM RIDE with the sloping out M matches the Avedis Zildjain ink of the day. So does the HEAVY RIDE as two separate stamps. You will see that in this example which word is bold is reversed. This is a 22" cymbal weighing 3870g with a the 1.5" version of the 60s stamp on it.
[img]http://www.vintagedrumforum.com/attachment.php?attachmentid=129319&d=1578687833[/img]
[img]http://www.vintagedrumforum.com/attachment.php?attachmentid=129321&d=1578687833[/img]
I haven't finished reviewing my records on model ink and I'm not sure whether the bold on HEAVY vs RIDE reflects different years of use in the factory. I suspect it will turn out to be that there were different stamps in use in the factory on the same day, some bold some not. What we do know at this point is that the HEAVY and RIDE were applied separately...since they appear in different places.
I've got other examples of very early Sabian ink and pre Sabian ink which straddle this time. This includes the Canadian K ink (78-81) which has an interesting mix of some Avedis Zildjian model ink stamps and some other ink stamps in what later came to be the Sabian style.
http://black.net.nz/avedis/NAK.html#CanadianK
All this and more will end up in Cymbal Wiki some day. Meanwhile about all I can say is that those "generations" from 2013 which xipa4 mentioned are a generation out of date with the research. And for the examples of early Sabian model ink which resurrected this thread I'd say yes they are 1980 give or take and predate the hollow ink model style Sabian used later on. The other thing we've established about the earliest Sabian cymbals is they didn't always put the ink logo on the bottom. That came later, and there also seems to be an increase in the size of the Sabian logo over time. What is on the bottom of your cymbals coll3ctor? Any ink at all?