A late 19th/early 20th-Century bimetallic temperature recorder
A late 19th/early 20th-Century bimetallic temperature recorder, with a plaque for NEGRETTI & ZAMBRA RANGE 0/100°F LONDON , the bimetallic helix held in a brass cage stamped R/5423 on the side of the glazed and ebonised metal case, containing clockwork drum and pen arm with stop lever, the hinged lid with brass carrying handle -- 25.9cm. (10in.) wide ; and a late 19th/early 20th-Century thermo-hygrograph with a plaque for CASELLA LONDON No 1995 , the recording mechanism housed in a cage on the side of the green crackle-finished glazed case containing clockwork drum and two pen arms with stop lever, the hinged lid with steel carrying handle -- 35.6cm. (14in.) wide (2)
A late 19th/early 20th-Century bimetallic temperature recorder
A late 19th/early 20th-Century bimetallic temperature recorder, with a plaque for NEGRETTI & ZAMBRA RANGE 0/100°F LONDON , the bimetallic helix held in a brass cage stamped R/5423 on the side of the glazed and ebonised metal case, containing clockwork drum and pen arm with stop lever, the hinged lid with brass carrying handle -- 25.9cm. (10in.) wide ; and a late 19th/early 20th-Century thermo-hygrograph with a plaque for CASELLA LONDON No 1995 , the recording mechanism housed in a cage on the side of the green crackle-finished glazed case containing clockwork drum and two pen arms with stop lever, the hinged lid with steel carrying handle -- 35.6cm. (14in.) wide (2)
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
.jpg "Source: Christie's")
.jpg "Source: Christie's")
