Prince Oysterdate Big Block

In spite of its official name, the Prince Oysterdate chronograph series does not display its name on the dial. Instead the indications “CHRONO TIME”, as on the 1976 model presented here, or “AUTOMATIC CHRONO TIME” on other dial variations are displayed.

The version of reference 9430/0 illustrated on the following page presents a black dial with three white counters with pronounced striations on two levels.

The introduction of the self-winding Valjoux chronograph calibre 7750 brought an additional innovation to the Oysterdate chronographs in the form of a rapid date change function. Indeed, while on the previous series one had to turn the hands around the dial many times to set the date after a period of non-use, now the position of the winding crown allowed direct access to the date disc.