Brandis & Sons Sextant

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Description
This sextant was probably made for use in World War I. Brandis termed it a "U.S. Navy surveying sextant, 6 inch radius, reading 30 seconds of arc." New it cost $120. The frame is anodized brass. The silvered scale is graduated every 20 minutes from -5° to +185° and read by vernier with tangent screw and magnifier. The inscriptions read "BRANDIS & SONS, BROOKLYN, N.Y." and "5670." The words "U.S. Navy-N-4705" are scratched onto the arc. The serial number inside the wooden box is 3946.
Ref: Brandis & Sons Mfg. Co., Catalogue No. 20. Instruments of Precision (Brooklyn, n.d.), p. 298.
Location
Currently not on view
date made
ca 1917
maker
Brandis & Sons, Inc.
place made
United States: New York, Brooklyn
Measurements
radius: 6 in; 15.24 cm
overall in case: 5 1/4 in x 9 3/4 in x 10 in; 13.335 cm x 24.765 cm x 25.4 cm
ID Number
1991.0446.01
catalog number
1991.0446.01
accession number
1991.0446
Credit Line
C. Richard Hoshaw
subject
World War I
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Data Source
National Museum of American History