Bathythermograph and sea sampler Mk1, by S.G. Brown Ltd., c. 1948 Bathythermograph and sea sampler Mk1 1948
Bathythermograph Mk 1B(deep), by S.G. Brown Ltd., with box, c. 1940. Bathythermograph Mk 1B(deep) 1940
Bathythermograph, circa 1940. Made in Leningrad. NIO number S96. Enamelled blue, in wood case. Thermometers missing. Used by Dr. J.N. Carruthers Bathythermograph, circa 1940. Made in Leningrad. NIO number S96. Enamelled blue
Bathythermograph Type CTB(shallow), by Bristol Co., Connecticut, c. 1940 Bathythermograph Type CTB(shallow) 1940
Bathythermograph MkV by S.G. Brown Limited, Watford, England, c. 1958 Angled bathythermograph Mk V, c 1958. 1958