A large Sestrel 8" dial brass cased aneroid barometer by H.S.T.M.I Co. Hull.
Hull Scientific & Thomas Marine Instrument Company were nautical retailers in existence in the early 1900's in the port city of Hull.
Bulkhead style case for mounting on a ship, metal dial in worn condition, pointer with half moon and setting arm with brass knurled adjustment knob, 28-31" scale of barometric pressure.
Measures total 27cm diameter x 10cm deep.
Weighs nearly 3kg.