Case: Polished stainless steel case. Polished 18kt yellow gold fluted bezel ring. Polished 18kt yellow gold Twinlock crown featuring two sealed zones when the crown is screwed down: the first inside the tube of the crown, the second inside the winding crown itself. Dial: Champagne dial. Applied polished yellow gold index hour markers with luminous fill. Fine printed minute/seconds track. Hands: Polished yellow gold hands. Partially skeletonized minute & hour hands so not to obscure the dual time Hour & minute hands with luminous filled tops. RING COMMAND BEZEL - Watch setting & Corrections: The bezel is key to setting the 3 functions of the watch (time, dual-time & annual calendar). The 'RING COMMAND BEZEL' features 3 positions with each position corresponding to a different function of the watch. Simply rotating the bezel to the position of the corresponding watch function will the correction of that particular function via the crown. GMT/Dual Time-Zone: Off-center champagne 24 hour ring. Inverted red triangle indicating the additional time-zone. Indicated in 24 hour mode to easily distinguish between AM & PM at the additional time-zone location. The dual time-zone is adjustable in one hour increments adjusted without stopping or interrupting the operation of the movement. SAROS Annual Calendar: Date window displayed at the 3 o'clock position with a 'cyclops' magnifier. Month display via small apertures (windows) at each hour marker (12 hours = 12 month). A red filled display window indicates the current month. A manual correction is required only once a year on March 1st to compensate for the shorter 28 or 29 days of February. The date can be adjusted both forward & backward. Movement: Rolex in-house calibre 9001, beats at 28,800 vph, contains 40 Jewels & has an approximate power reserve of 72. Paramagnetic blue Parachrom hairspring. High performance Paraflex shock absorbers. The watch boasts a total of 14 patents, seven of which are on the movement. AKA: m326933-0001