Thanks for the comment Bill. I found two through searching google pics but the badges had either been removed or worn.
Didn't find anything just now in a patent search- it seems to have been, but it might be under some other search terms.
Weird design, but "weird in a good way". So naturally I looked at Oliver of Adrian and Royal Oak!
No Joy..
But it is probably NOT a Cincinnati or K.O.Lee.
Pratt & Whitney did some bizness in grinders. So did K&T. B&S, of course. Gallmeyer & Livingston didn't make "only" straight SG's..
In general, I'd look more to the larger and older and less-common ones than not.
I did say "older"? Not just because it has a lot of scars. It just has that sort of complexity to it later sweated out by "production engineering" for lower cost to manufacture.
Even if... it was made by a third-party.. it might show-up WITH one of the grinders.
Unfortunately we don't see much on those.
"Less common" is just that way..