Fantastic Antique Thermograph. England, 1st Third of the XX Century

Antique thermograph with copper box and brass mechanism, made in England in the first third of the 20th century. This lovely device is designed to record the temperatures of a particular place and determine the average annual temperature.Among all the instruments component parts there is probably one missing, a small rod that presses the pointer towards the paper. Nevertheless, this detail does not interfere in the thermographs working order, which is real nice. It works in a very simple way: the device includes a wind-up clock movement that turns the cylinder with the paper, so it makes a full revolution a week. At the same time, the rest of the metal pieces register the temperature changes and transmit them to the pointer so it draws a graphic on the paper. It is a simple and fully reliable system. The brass component parts are in good condition. The brass shows some traces of rust; probably the device was used in a wet place, maybe at the sea. The copper box that protects it is greatly preserved. Screwed to the base there is a golden brass plate with an engraved inscription: BIMETALLIC THERMOGRAPH MK 3 REF. Nº MET. 1123 SERIAL Nº MO 3230 S. & J. ENGINEERING (HENLEY) LTD. On the other hand, the clock movement bears the following words engraved in the metal: STANDARD DRUM TYPE S REF. NO. MET. 2414 GLUCK ENGINEERING. And last but not least, the wind-up key is also marked with the words HORSTMANN BATH ENGLAND. Its amazing working order and singular charm turn this antique thermograph into a collectors piece, so beautiful and special. Measurements: Width: 10.6 in / 27 cm. Height: 5.1 in / 13 cm.