Oscar Hanks Circumferentor

Description:

Oscar Hanks Circumferentor, Troy, New York, c. 1834-45, 5 1/2-in. dia. engraved brass dial marked "O. Hanks/Troy, N.Y./Patent," single vernier, compass ring with two inset spirit levels, locking knob on side, and 8-in. sighting vanes, lg. 9 in.

Note: According to Bill Skerritt, this form of compass is often called a "railroad compass." This instrument is closely related in form and function to the bow compass. "Patent" refers to the Julius Hanks patent of 1831 for bow sights and needle.


Provenance: William H. Skerritt.
Estimate $400-600

lacking needle, and arrestar, one of the vane screws possibly an old replacement.


Items may have wear and tear, imperfections, or the effects of aging. Any condition statement given, as a courtesy to a client, is only an opinion and should not be treated as a statement of fact. Skinner shall have no responsibility for any error or omission.

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