Hello - I have a 666 diver with case number 386-1, dates from 1967. The bidirectional bezel has a spring loaded ball that is still intact. However, the bezel is a touch too loose; I can make it slightly rattle with a shake of the watch. It is not so loose as to fall off, thankfully.
Does anyone know if this model needs a bezel spring or gasket? I cannot find this info anywhere on the 386 series cases. Thanks in advance.