This is a single lens optometer instrument. The lens and brass...
British Galileo type telescope circa 1810. This is a 3 draw brass...
This instrument was made by Bausch & Lomb Optical Co. Rochester...
A High Magnification X50 Measuring Pocket Microscope. This is a...
This is a 19th century Masterpiece microscope made by Bausch &...
A British military device for measuring the distance between pupils....
This is a set of lenses for testing sub-normal vision. The set...
The instrument was made and signed by the famous French scientific...
This is a sight alignment tool for muzzle boresighting. Boresighting...