Basel '11: New Yachtmaster II - specs

[Tools]

OYSTER PERPETUAL YACHT-MASTER II

CASE

Type OYSTER (monobloc middle case, screw-down case back and winding crown)
Diameter: 44 mm
Material: EVEROSE ROLESOR (combination of 904L stainless steel superalloy and 18 ct EVEROSE gold), polished finish
Case back: Screw-down with Rolex fluting
Bezel: Bidirectional 90° rotatable RING COMMAND bezel in 18 ct EVEROSE gold. Blue CERACHROM insert with engraved numerals filled with pink gold via magnetron cathode sputtering
Winding crown: 18 ct EVEROSE gold, screw-down, TRIPLOCK triple waterproofness system
Shoulders to protect the crown
Crystal: Scratch-resistant sapphire
Waterproofness 100 metres (330 feet)

MOVEMENT
. Calibre 4160, Manufacture Rolex
. Chronograph movement with column wheel and vertical clutch
. Precision Officially certified Swiss chronometer
Functions:
. Programmable regatta countdown with mechanical memory, retrograde minute hand and on-the-fly synchronization of the countdown seconds and minute hand to the nearest minute
. Small seconds hand at 6 o’clock
. Stop-seconds for precise time setting
. Oscillator Frequency: 28,800 beats/hour (4 Hz)
. Non-magnetic blue PARACHROM hairspring
. Breguet overcoil
. Large balance wheel with variable inertia
. High-precision regulating via four gold MICROSTELLA nuts
. Traversing balance bridge
. Jewelling 42 rubies
Winding:
. Bidirectional self-winding via PERPETUAL rotor on ball bearings
. Power reserve Approximately 72 hours

DIAL
. White lacquered, snailed pink gold small seconds counter CHROMALIGHT display with long-lasting luminescence
. Hour markers 12 appliques in pink gold
. Hands Pink gold, blued

BRACELET
. Type OYSTER, three-piece solid links
. Material EVEROSE ROLESOR (combination of 904L stainless steel superalloy and 18 ct EVEROSE gold), polished centre links, satin-finished outer links
with polished edges
. Clasp OYSTERLOCK folding clasp with safety catch
EASYLINK 5 mm comfort extension link
REFERENCE (CASE – BRACELET): 116681 – 78211