This excellent specimen’s photos were graciously submitted by Ammiel Schwartz.
These have long side bars with loops at the end. Note the strong plus lenses.
Note the “crankshaft” nose piece and the loops on the ends of the side pieces.
This is the black color model of the direct ophthalmoscope that was popular in the 1960s.
Bausch and Lomb Keratometer Manual. Model H-135. Around 1928.
Three pages. PDF available.