Click image to enlarge.

Box Sextant

Catalogue number:
PH*333639

Inscriptions:
"KEUFFEL & ESSER CO. N.Y. MADE IN ENGLAND" AND "1792"

Dimensions:
diameter 3.25 inches

Discussion:
This box sextant was probably made around 1900. New, it cost $40. The silvered scale is graduated every 30 minutes from -5^o to +150^o and read by vernier with swinging magnifier to single minutes of arc.

Ref: Keuffel & Esser, Catalogue (New York, 1906), p. 415.

Further Information:

Keuffel & Esser
Box Sextant