Brass Surveyor's Vernier Compass

Description:

Brass Surveyor's Vernier Compass, by Hugo Hartmann, Philadelphia, with brass 6 1/2-inch dial, silvered compass ring scaled 0-90 in four quadrants, two bubble-levels, two sight vanes and outkeeper counter on shaped brass limb, lg. 16 in., in mahogany carrying case.

Note: Hugo Hartmann is listed as an instrument maker at 330 Noble St., Philadelphia, between 1853-1856. Between 1857-1859, listed as an instrument maker at 63 Dock St.
Estimate $2,500-3,000

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