細節
RICHARD FRERES, Paris
A small (aeronautic?) barograph, No. 83859, with drum, vacuum chamber and recording pen, in hinged mahogany case with glazed front, conversion chart and Jules Ricard retailer's label -- 6¾in.(17cm.)wide
A small (aeronautic?) barograph, No. 83859, with drum, vacuum chamber and recording pen, in hinged mahogany case with glazed front, conversion chart and Jules Ricard retailer's label -- 6¾in.(17cm.)wide