Favre Leuba Bathy 50 Blue Prototype.
I knew the black dial, only, and recently discovered that a blue dial existed, but it seems it is a Prototype. Credit: Hairspring. The Bathy 50 is a great watch, including a mechanical depth gauge, which was quite rare at that time ( 1966 ), even if that ...
That really is a stunning looking Favre Leuba Bathy 50 Blue Prototype.
As you say uber rare and it looks like it just left the factory as it is so bright and sharp. to quote Max "Simply Lovely" Marc
