Schmalcalder's Patent Prismatic Compass

Description:

Schmalcalder's Patent Prismatic Compass, no. 82 Strand, London, first quarter 19th century, 2 1/2-in. green floating paper compass card marked as above, folding adjustable prismatic magnifier sight, sight wire, and sunshades, housed in an associated leather carrying case.
Estimate $200-250


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