After a little more research on the net tonight: it looks like the keyboard in
the 4006 was pretty much one of Cherry's standard "B70 ASR" models. The key
mechs are known as M7 T-mount, and the caps look like the standard double shot
ones supplied by Cherry in their mid to late 70's catalogs.
A lot of the Tek terminals I've seen for sale seem to be missing a few teeth; I
guess these caps didn't hold on well enough to weather the decades without a
few from most keyboards getting lost along the way. It's probably worth
working up some 3D models for these caps.
Also, keyboard research turns up some sad, sad, things... Brrrr... :-(
--FritzM.
