I don't really know much about this thing. I know its an OLD Bausch &Lomb Vertometer, I know its heavy, and when you plug it in, and flick the switch a light comes on. Talking to some eyecare professionals it is used to measure the length of the eye.
It's in great shape, I believe it was in storage for a long time. The serial Number is XC-135
A vertometer is an ophthalmic bench instrument used to measure diopter power of a lens. It differs from a lensmeter or lensometer which is a general dispensary tool for opticians to verify spectacle prescriptions at the laboratory. A vertometer, on the other hand, is a more precision instrument used to locate, mark, and index a lens optical center for edging, mounting, and construction of a spectacle prescription.
While I as a layman don't really know much more than that, I'm sure an optometrist would be able to know some more information for you, or it would just be a nice antique for a collection
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