This compound monocular is a Spencer Model 44 with coarse and fine focus, curved arm, double nosepiece, square stage, inclination joint, sub-stage condenser and diaphragm, sub-stage mirror (this is missing), horseshoe base, and wooden box. The inscription reads “SPENCER / BUFFALO / USA / 47339.” The serial number indicates a date of 1918.
The Spencer Lens Co. boasted in 1920 that the No. 44 was “the most popular of all Spencer Microscopes. Thousands are now in daily use in medical and general laboratories, also by physicians.” In 1930, it claimed that the No. 44 was “the most popular of all Spencer microscopes for routine work in the laboratory of the hospital, medical school, or general practitioner.” It was “simple in design and durable in construction,” and “fully meets all standard requirements.”
Ref: Spencer Lens Co., Catalog of Spencer Microscopes, Microtomes and Accessories (Buffalo, 1920), pp. 32-33.
Spencer Lens Co., Catalogue (Buffalo, N.Y., 1930), p. 17.
Currently not on view
Object Name
date made
ca 1918
Spencer Lens Company
Physical Description
wood (overall material)
steel (overall material)
brass (overall material)
glass (overall material)
black (overall color)
average spatial: 33.8 cm x 17.3 cm x 21 cm; 13 5/16 in x 6 13/16 in x 8 1/4 in
average spatial: 29 cm x 11.2 cm x 17.7 cm; 11 7/16 in x 4 7/16 in x 6 15/16 in
place made
United States: New York, Buffalo
ID Number
accession number
catalog number
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center


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