
Six point totally enclosed indicator

6 point totally enclosed indicator, range 30 - 100 deg F. (No. 61771), made by Cambridge Instrument Co. Ltd., London SW1, United Kingdom, 1900-1982
6 point totally enclosed indicator, range 30 - 100 deg F. (No. 61771), made by Cambridge Instrument Co. Ltd., London SW1, United Kingdom, 1900-1982