Details
An aneroid differential barometer
with nickelled barometer with ocular, thermometer and threaded scale divided 0-90, signed Gottinger & Co., Zurich, combination compass/clinometer on tripod mount and instruction sheet, in fitted, chamois-lined leather case, all in leather slip-case
with nickelled barometer with ocular, thermometer and threaded scale divided 0-90, signed Gottinger & Co., Zurich, combination compass/clinometer on tripod mount and instruction sheet, in fitted, chamois-lined leather case, all in leather slip-case