Ventes live - Lot 1176
[Surveying instruments]
Mining theodolite.
Brussels, P. Boël, 2nd half 19th c
€ 200 / 300
Enchérir en direct (Drouot*) Enchérir en direct (Invaluable*)Les enchères sont closes
Description du lot
Brass horizontal disk with silvered graduated magnetic compass, signed on compass scale with maker's name, graduated half vertical circle, telescope and alidade and tubular spirit level, on brass tripod.
Wooden box (31 x 31 x 27 cm).
So-called "boussole de mine" to compute slopes in mineshaft excavation.
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