"Diska" clinical thermometer

Made:
1940-1970 in London and Merton
maker:
G H Zeal Limited
Diska' clinical thermometer, diska bulb, lens stem, by G. H. Zeal, London, 1940-1970'

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Diska' clinical thermometer, diska bulb, lens stem, by G. H. Zeal, London, 1940-1970'
Science Museum Group
© The Board of Trustees of the Science Museum

"Diska" clinical thermometer, diska bulb, lens stem, by G. H. Zeal, London, 1940-1970