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