I like those mounts, and there are similar designs from different manufacturers.
I have a Tasco 7TE-2 and a 7TE-5 mount. Their RA gears are different a there are a couple minor differences in them.
Here is my Selsi 247 mount, that is for a 80x910 scope:
Here is the mount from an ATCP 1254, 80x1200:
In comparing the ATCO and Tasco mounts that I have they have the same dimensions, but on the Selsi, it is wider where the two levers tighten.
But, what is the actual name or design of these mounts? Is there one?
Those are nice.
I've alway thought it's interesting how similar so many of them are, yet when you look closely, so many small differences.
(I suppose you could say that about other components, like focusers, and finders)
Maybe we could use a thread showing them and their differences?
(or maybe all classic GEMs just for fun)...have we done that?
This style seemed to have a period of years when it was 'the standard' (late 50's to late 70s?)
What brand, model, maker of scope was the first...and what was the last model and year of telescope with one?
You even see this style on some Vixens and Mizars up until maybe just shy of 1980.