Charles Delagrave et Cie, Paris: c.1880-1910 , boussole is French for compass , an alidade is a sighting device or pointer for calculating slopes, angles and directions invented by General Paul Peigné (1841-1919) , picture included in posting .
Mahogany and boxwood, with glazed compass and metal fittings
L.3.5 in , W., 3.5 in. , D. 1.25 in
Good condition , glass broken , string need restoration .
I can be reach at the 310 994 6009 if you want more info , for shipping outside the US please contact me for pricing and condition .