Japanese Military Barograph 1941

A particularly rare surviving Japanese military barograph manufactured by the Kasahara Instruments Co. and issued to the Army Weather Department in April 1941. The barograph works fine, responding well to atmospheric fluctuations and the instrument is complete with its original dated certification, transport box which includes a large quantity of Japanese temperature charts, a compass, clock key and box for spare nibs. There is also a spare clock drum (although this is not currently functioning).