Minimum thermometer, sheathed, spirit in glass, Mk 2C, Met 21201, MO 35514/61, NPL61, by Short & Mason Ltd.,1961 Minimum thermometer 1961
Sheathed Minimum thermometer, with box by Negretti & Zambra, London, England, 1931 Minimum thermometer with box, British, 1931 1931
Minimum thermometer with bifurcated bulb, on ebonite, by Louis Casella, c. 1873. Minimum thermometer with bifurcated bulb 1873