Plesch Tonoscillograph, 1931-1940

Plesch Tonsillograph, 1931-1940.
Tonoscillograph with tonoscillogram, of the type invented by Professor J Plesch, in a case. Plesch lived in Germany, but this instrument for measuring and recording blood pressure was manufactured by Hawksley and Sons, London.
 
Currently on display in:
Health Matters
Year made :
1931-1940
Inventory number :
A600389