Live auction - Lot 1176
[Surveying instruments]
Mining theodolite.
€ 200 / 300
Live bidding (Drouot*) Live bidding (Invaluable*)Bidding is closed
Lot description
Brussels, P. Boël, 2nd half 19th c
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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