Maple Semi-Circumferentor

Description:

Maple Semi-Circumferentor, incised BB, with scale 0-90-0, bubble-level (lacking vial),alidade with North marked, shaped steel needle with brass hub and engraved North / South points, brass needle-lifter with hook clamp operated from underside, on hollowed-out folding bone handle with engraved lines and ball-and-socket mount, radius 7 in., (lacking sights).
Estimate $600-800

Keywords