ROLEX Submariner non-date watch

ROLEX " Submariner non-date "that inherited the tradition to ensure
the　evolution, appeared.

With respect to movement, without change of the number of caliber Cal.3130,
hair spring changed to blue para chrome hair spring to catch up with the present
 " Submariner date ".

In the current watch industry, 904L SS case is used only in Rolex,
the crown guard of which growed in size.

 Also unidirectional rotating bezel got in ceramic chrome bezel, index PVD-coated
with platinum on a black ceramic. Luminous material of hour markers set in the dial,
changed to a proprietary chrome light to illuminate in blue.