ID this Thunderball Sub

[reedzpainter]

I was watching some of Thunderball last night when I noticed a few shots that one, are continuity mistakes, and two, perhaps a new watch that I haven't seen come up in searches.
These screen shots are from the scene when the imposter pilot crash lands the jet and is then effectively 'silenced'. The first shot is the struggling pilot wearing the Breitling Navitimer (black strap); and the second is the same drownee but with a telltale oyster bracelet strapped to his wrist.
I thought this was pretty cool that the film dive crew chose to use a Rolex as their professional instrument of choice; and then I thought, what model is it anyway? Enter TRF. Full spec 6538/5510 or a more current (1964/5) model. Thought maybe I could make out some crown guards; but would be cool if it was a big crown on bracelet.
Cheers!