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.
Bezel Fixed
Bracelet/Strap Leather
Case Depth 15.5mm
Case Material Steel
Case Width 46mm
Chronograph Yes
Date Yes
Day Yes
Dial Colour Black
Gender Mens
Movement Automatic
Supplier Model No. 01 675 7648 4264-07 5 23 77
Warranty Oris Official 2 Year Guarantee
Water Resistant 30M
SKU OR-694