Combined sphygmomanometer and sphygmo-oscillometer in case

Made:
1920-1940 in England
Combined sphygmomanometer and sphygmo-oscillometer in case

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Combined sphygmomanometer and sphygmo-oscillometer in case
Science Museum Group
© The Board of Trustees of the Science Museum

Combined sphygmomanometer and sphygmo-oscillometer in case, by Detensyl, c.1930