Six point totally enclosed indicator
1900-1982
6 point totally enclosed indicator, range 30 - 100 deg F. (No. 61771); two resistance thermometers for air temperature, watertight pattern (Nos. C63555, C62301) [test coil and dry battery and resistance thermometer for air temperature (No. C24314) missing and written off 1988] made by Cambridge Instrument Co. Ltd., London SW1