Dated 1850-1870. From Scientific apparatus, musical instruments and telegraph equipment, [1834-1875].

Telegraph bell sender developed by Wheatstone and John Matthius Augustus Stroh (1828-1914), telegraph engineer and inventor, in a mahogany case with brass and ebony winding handle and brass terminals.  Part of original Wheatstone Collection labelled ‘Wheatstone and Stroh's Electro-magneto bell’ with detailed description and museum catalogue markings on the rear of the case.