RareJ.L. self-reducing tacheometer. Sanguet, inventor builder, 31, rue Monge, Paris. Late 19th century.
Brass with silver plated ladders. Height: 33 cm D. of the top14 cm. Tilting bezel 35 cm.
Spirit level OK.
This instrument, designed to measure azimuthal angles, distances and declivities, was patented by Jean Louis Sanguet (1848-1921) in 1866 and perfected over the following decades.
He won a gold medal at the 1889 International Exhibition.
Signed on the horizontal circle.
in Antiek / Meubels en kunstvoorwerpen