Antique Round Aneroid Wall Barometer - J. Garraio Lisbon circa 1920.

J. Garraio company founded in 1860 is a landmark as a supplier of the navy and official distributor of the sea charts of the British Admiralty.

An Otis King Cylindrical slide rule, in perfect condition.

Beautiful crafted, it's very hard to get!

Hydrometer - Old alcoholometer measuring device.

Alcoholometer from early XX century in perfect condition - Extracto - œnomètre Dujardin.