ROLEX REF. 1665 SEA-DWELLER RAIL DIAL STEEL
Rolex, "Oyster Perpetual Date, Sea-Dweller, 2000 ft./610 m.,
Superlative Chronometer, Officially Certified", No. D505252, case
No.5721666, Ref. 1665. Made in 1978.
Very fine and rare, center seconds, self-winding, water resistant,
stainless steel wristwatch with helium escape valve and date and a
and a stainless steel Rolex Oyster Fliplock bracelet.
Three-body, polished and brushed, screw-down case back and
crown, helium escape valve at 9, graduated bi-directional revolving
black bezel (later insert) for the decompression times, trip-lock
winding crown protected by the crown guard, sapphire crystal.
Black with luminous white round, triangular and baton indexes,
aperture for the date, outer minutes/seconds divisions. Luminous
steel skeleton hands.
Cal. 1570, rhodium-plated, oeil de perdrix decoration, 26 jewels,
straight line lever escapement, monometallic balance adjusted
to temperatures and 5 positions, shock absorber, self-compensating
free-sprung Breguet balance spring, microstella regulating
screws, hack mechanism.