Two Unmarked Surveyor's Vernier Compasses, 19th century
Two Unmarked Surveyor's Vernier Compasses, 19th century,
7-in. dia. silvered dial with cardinal and intercardinal points, outer scale divided in four quadrants, needle hold-down, vernier on north arm, and opposing spirit levels; the other with a 7-in. dia. brass dial, and vernier mounted to south arm.
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Two Unmarked Surveyor's Vernier Compasses, 19th century,
7-in. dia. silvered dial with cardinal and intercardinal points, outer scale divided in four quadrants, needle hold-down, vernier on north arm, and opposing spirit levels; the other with a 7-in. dia. brass dial, and vernier mounted to south arm.
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