Came across a gadget in a box of stuff yesterday whilst searching for something else.
I've had it for over 20 yrs and still don't know where it came from.
Bore is 13/16ths or 0.8125".
Kudos to anyone that can correctly identify it.
LOL, All good replies so far, there are no markings whatsoever, it is painted in black crinkle paint. All ally except for adjusting screw and nut and spring.
I'm guessing an optical lens control device of some sort.
Think old fashioned black/white photographic enlarger.
The finish reminds me of old Kodak cameras.
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