This example of Leitz’s model IIa is a compound monocular with coarse and fine focus, triple nosepiece, square stage, inclination joint, sub-stage condenser and iris diaphragm, sub-stage mirror, and wooden box. The inscription reads “E. Leitz Wetzlar / No 125871.” The serial number indicates a date around 1909. A brass tag on the box reads “E. Leitz-Wetzlar / NEW. YORK. CHICAGO.” The donor bought this from Dr. Randolph of Upperville, Va., in around 1919, and used it in medical school.
This has a mechanical stage marked “BAUSCH & LOMB OPTICAL CO. / Rochester, N.Y. U.S.A.”
Ref: Ernst Leitz, Microscopes and Accessory Apparatus (Wetzlar, 1907), pp. 42-43.
Currently not on view
Object Name
date made
ca 1909
Leitz, Ernst
Physical Description
brass (overall material)
glass (overall material)
steel (overall material)
wood (overall material)
overall: 33.6 cm x 19.5 cm x 17 cm; 13 7/32 in x 7 11/16 in x 6 11/16 in
overall: 30.4 cm x 10 cm x 16 cm; 11 31/32 in x 3 15/16 in x 6 5/16 in
place made
Deutschland: Hessen, Wetzlar
ID Number
accession number
catalog number
Science & Scientific Instruments
Science & Mathematics
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Dr. & Mrs. R. Massie Page
Additional Media

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