Oris Big Crown X1 Calculator 01 675 7648 4264-07 5 23 77 Watch

Oris - Big Crown - Oris Big Crown X1 Calculator (OR-694)

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The first manned supersonic flight took place on October 14 1947. Oris Big Crown X1 Calculator is inspired by this event. The timepiece is equipped with Oris 675 automatic calibre, a modification of ETA 7750. The movement performs 28 800 vibrations per hour and has 25 bearing jewels. A 42-hour power reserve is available for the convenience of the wearer. Hands and indices are luminous for improved night time visibility. The chronograph of the watch comes with a 60-second, a 30-minute and a 12-hour register. Day and date displays are available, as well. Oris Big Crown X1 features a historically accurate slide rule. Additional useful characteristics include screw-in security crown, see-through case back and scratch-resistant sapphire crystal glass with anti-reflective coating, Case is Multi-piece stainless steel case, grey PVD plated.