Audemars Piguet Royal Oak Offshore 26091

For sale rare watch audemars piguet millenary dead beat seconds The watch is brand new - never worn ! a collector piece . located in Russia , Moscow for a face to face deal photos attached The Dead Seconds Complication: With regular mechanical watch the beats per hour (vph) interpret into the frequency the seconds hand advances - giving the seconds hand the perception of smooth motion AKA "the sweep seconds hand". With the dead seconds complication the seconds hand jump every second (much like a quartz watch). This complication is achieved through am additional going-train driven by a second barrel. AP devised a system with two superimposed seconds-wheels driven by a "differential", one is free and moves steadily forward at the rate of the VPH, while the other carries wolf's teeth and moves in jerks – hence the jumping seconds. The new AP High Efficiency Direct-Impulse Escapement is proudly displayed on the dial side of the watch. The benefits of this new escapement are considerable: No need for lubrication on the pallet-stones. Detached single-beat escapement: A single impulse corresponds to two vibrations, thus decreasing disturbance to the rate and promoting extremely high efficiency. Direct impulse on the balance: The energy is transmitted directly from the escapement to the balance instead of via the lever, thereby reducing energy losses and increasing efficiency. High efficiency: In a movement equipped with a Swiss lever escapement, the latter absorbs 70% of the energy. The system developed by Audemars Piguet absorbs only 50%, representing a considerable gain in efficiency compared to a classic movement. Excellent shock-resistance: The meticulously developed shape of the various parts (especially the guard-pin) and their ultra precise machining guarantee optimal security against "tripping" and "over banking". Long-term stability: The tests conducted over the past five years have shown that this escapement displays excellent operational stability. Improved accuracy/chronometry: the isochronism of the sprung balance may be adjusted by shifting the locking-point in relation to the impulse provided by the balance; a reduction in mechanical disturbances to the balance improves the overall precision of the movement. AP Caliber 2905, beats at 21,600 vph, contains 31 jewels, composed of 233 components & has an Power Reserve of 7 days. All parts decorated by hand beveled, rhodium-plated and decorated with Cotes de Geneva finish.