Hughes Printing Telegraph, circa 1900
Auction Team Breker identified this instrument as a Siemens & Halske synchronic printing telegraph, no. 5423, built circa 1900 after David Edward Hughes's 1856 design. The page describes an electric motor drive, centrifugal governor, and 28 double-function keys.
Source page: Auction Team Breker, Hughes Printing Telegraph. The raw saved HTML is also preserved as original-page.html.