Portable Barograph by Jules Richard

Description:

Portable Barograph by Jules Richard, Paris, the hinged leather case with glazed viewing window opens to the mechanical elements enclosed within a nickel cover marked with maker's name, paper rolls and stylus, fitted hardwood box with compartment for charting paper and ink bottle, instrument size, 4 3/4 x 3 1/4 x 1 1/4 in.
Estimate $400-600

Keywords