Very nice custom helicoid (with infinity INDUSTAR-23U)
Vintage Super Macro INDUSTAR-23U 4.5/110 Soviet USSR Lens m39 Enlarger I23
Enlarging Lens
39mm screw thread (M39)
click stops
I am not sure why an enlarging lens should have a what appears to be a deep built in lens hood: maybe it was also designed to be used with close-up bellows.
CONDITION:
Very good cosmetic condition, see photos
It can be used as a macro lens on a cameras Additional photos can be sent
The lens is inspected with dosimeter, no radiation traces found