French pocket aneroid barometer, early 20th century, with silvered millimetre and inch dial inscribed 'Bourgeois, 27 Rue Des Pyramides, Paris', 3.75" diameter, in leather case, PROVENANCE: Thetis Blac
French pocket aneroid barometer, early 20th century, with silvered millimetre and inch dial inscribed 'Bourgeois, 27 Rue Des Pyramides, Paris', 3.75" diameter, in leather case, PROVENANCE: Thetis Blacker.