K/PP107/11/5/6
Dated 1835-1851. From Scientific apparatus, musical instruments and telegraph equipment, [1834-1875].
Automatic harmonium chord transposition assembly devised by Wheatstone. Wooden casing with metal levers and ivory buttons.
Dated 1835-1851. From Scientific apparatus, musical instruments and telegraph equipment, [1834-1875].
Automatic harmonium chord transposition assembly devised by Wheatstone. Wooden casing with metal levers and ivory buttons.