Venner Time Switches, London - A 10-second flyback split timer in the original case

circa 1933, number 3020, type B77, the signed white dial, 51mm, with black Arabic numerals (0 in red), blued centre sweep with additional split time sweep, subsidiary 10 seconds register at 12 o'clock and twin chemin de fer chapter rings, unsigned jewelled crown wind movement number 3364, Swiss patent number 100230, D.R.P. number 388992 decorated with 'The Côtes de Gèneve', with onion shaped winder, split timing pusher at 11 o'clock and covered spare parts compartment, case, 57mm diameter, verso hinged at 6 o'clock with personal engraving, inner numbered 572674 7, the cuvette similarly numbered, presented in the original personalised blue leather and gilt tooled fitted case, inner signed and lined in cream material and dark blue velvet

Venner were specialists in the manufacture of timers, synchronising clock systems and timing switches. The central seconds hand completes one revolution every 10 seconds, and each 10-second interval is recorded on the subsidiary dial. The secondary sweep hand can be stopped independently of the main hand, which continues to run.