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This small compound monocular is a Spencer Model 75, a “Real Pocket Microscope” designed for that “large class of scientists” who wished to carry a microscope into the field. It has a push-pull focus, square stage, sub-stage mirror, and metal case. The inscription on the tube reads “SPENCER / BUFFALO / USA.” That on the box reads “SPENCER / BUFFALO / USA / 194.”
Ref: Spencer Lens Co., Catalog of Spencer Products (Buffalo, N.Y., 1924), p. 43.
Oscar W. Richards, “A Small Spencer Folding Pocket Microscope,” Microscope 27 (1979): 1-3.
Currently not on view
Object Name
date made
Spencer Lens Company
place made
United States: New York, Buffalo
Physical Description
metal (overall material)
overall: 1 1/4 in x 4 1/16 in x 2 1/2 in; 3.175 cm x 10.31875 cm x 6.35 cm
ID Number
catalog number
accession number
Credit Line
Oscar W. Richards
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Science & Mathematics
Data Source
National Museum of American History
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