Tudor calibre 390
Oyster case by Rolex, calibre 390 movement by Fleurier.
The calibre 390 is a 17 rubies automatic, non-hacking movement used in many early Tudor watches.
Pictured here is a cal. 390 inside a c 1966 Submariner 7928.
Its rotor resemble the one used in the Rolex calibre 1030. Some people mistakenly believe that the 390 is an inhouse movement produced especially for Tudor before they started to use ETA. The 390 is, however, based on the calibre 350 Fleurier ébauche.
