A nickel-plated brass Hawksley-Type сompact ear trumpet hearing aid, with telescopic earpiece-tube and decorative grille. Length 13,5cm. England, c.1880.

Hearing tube with a parabolic bell, brass. Bell-shaped sound collector (London Dome type) with a U-shaped hearing tube that originates from the bottom of the bell and exits from the side, curving back upward in a U-shape (“swan-shaped”). Decorative floral grill. No manufacturer’s markings. England, ca. 1880.

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