Bidspirit auction | Pocket barometer, 19th century, gold-c

Pocket barometer, 19th century, gold-c - Pocket barometer, 19th century, gold-colored metal case in original leather case, altimeter or altimeter, round, marked ''Karl Zürcher, Optiker Zürich'', function untested, signs of age, l. w eyelet approx. 7.5 cm