The Spencer Lens Company introduced its Model 55 in 1914, explaining that this “new and unique instrument” had been produced “in answer to a demand for a binocular microscope with a very large stage and also for a very great range in the distance from the stage at which the objectives may be used.” The new Model 56, moreover, was simply the upper part of Model 55.
This example of the Model 56 has coarse and fine focus, triple nosepiece, rectangular stage, and wooden box. The inscription reads “SPENCER / BUFFALO / USA.” The 143189 serial number indicates a date around 1938.
Ref: Spencer Lens Co., Spencer Microscopes and Accessories (Buffalo, N.Y., 1914), pp. 50-51.
Spencer Lens Co., Low Power Binocular Microscopes (Buffalo, N.Y., 1935), pp. 6-7.
Currently not on view
Object Name
date made
Spencer Lens Company
Physical Description
wood (overall material)
metal (overall material)
glass (overall material)
black (overall color)
overall: 35.7 cm x 23.3 cm x 19.7 cm; 14 1/16 in x 9 3/16 in x 7 3/4 in
overall: 24.5 cm x 13.4 cm x 19 cm; 9 21/32 in x 5 9/32 in x 7 15/32 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
Credit Line
Division of Marine Invertebrates, National Museum of Natural History, Smithsonian Institution
Additional Media

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