Thanks for that info from Magnus. Nice to see it again. I have a copy of it somewhere too.
I'm compiling a timeline of New Beats including years and examples of the changes in ink, plus as many weights as I can lay hands on. At the moment that's 13 pairs of 14" ones, plus 6 pairs of Armands (which were said to be fairly similar to the earlier New Beats weights).
Steve, yes yours sound like they are just Hats rather than New Beats. Both models continued to be made for many years.
The 1st Generation ones with only ink on the bottom look like this, and your ink stamp looks to be of the same style (although from the weights yours aren't New Beats).
[img]http://black.net.nz/cym2014/NewBeatBottom60s.jpg[/img]
Both Magnus and I have a pair from this era. His weigh 826g over 1260g. Mine weigh 975g over 1300g.
By the late 70s (78 begins the hollow Zildjian ink on the bottom according to most sources) they looked like
[img]http://black.net.nz/cym2014/NewBeatHollow.jpg[/img]
Later more ink goes on and we get the model on top along with the solid Zildjian ink:
[img]http://black.net.nz/cym2014/NewBeats80s.jpg[/img]
But I think there is an intermediate step after the hollow ink logos and before the ones shown above. I'm still working on collecting it all up.
A note on dates: Paul Francis also says 1968 for New Beats, but the Zildjian web site (in the Timeline) puts them at 1963. I don't know if that is a mistake. The associated photo is also not consistent with the caption. So I'm thinking the 1968 date is more believable at this point. But then we get to the matter of the pressed in die stamp. The die stamp on my pair are straight up "early 60s" stamps and are the expected 1.25" tall. Not the "later 60s" taller version which is 1.5". I don't know how that sits with the rest of the data I've presented. Maybe Drumaholic (who identified the die stamps and I believe gave the dates we commonly use) knows what it all means.