Maximum thermometer, sheathed, by Negretti & Zambra, London, England, with box, 1931 Maximum thermometer & box, British, 1931 1931
Sheathed mercury in glass, centigrade, maximum MkII c, thermometer by Zeal, BS 692, Met 21101, MO 51494/75. Sheathed mercury in glass 1975
Sheathed mercury - in - glass fahrenheit Mk II B maximum thermometer by G. H. Zeal Ltd., London, B55692, Met. Ref 1016, MO 22093/51, NPL52. Sheathed mercury - in - glass fahrenheit Mk II B maximum thermometer by G. H. Zeal Ltd. 1951
Sheathed mercury-in-glass maximum fahrenheit thermometer Mk II, by G. H. Zeal Ltd., London, B5 692, Ref. No. Met 1016, MO 26781/62, cased. Sheathed mercury-in-glass maximum fahrenheit thermometer Mk II 1962