Dudgeon's sphygmograph by Hawksley, English, c.1890, the clockwork housing engraved 'T. P. Hawksley 357 Oxford St London', with clockwork mechanism to one side, dark fabric wrist strap, in original black leather covered case, lined in purple velvet, with the trade logo inside the lid.

The rare spectrometer by „Franz Schmidt & Haensch", Berlin, end of 19. century. Constructed of lacquered and ebonized brass, it features a brown enamelled tripod base made of cast iron. The main assembly consists of a central pillar mounted on the tripod base, supporting a drum that holds the prism and three tubes