The Ingenieur Perpetual Calendar Digital Date-Month is the flagship of the Ingenieur family. The design is inspired by the very first Ingenieur models and features a simple round case and polished bezel. The perpetual calendar with large digital date and month displays, which can be easily set using the crown, recognizes the different lengths of the months and takes into account the leap day every 4 years. The IWC-manufactured 89801-calibre movement also features a chronograph function. This timepiece has a 45-millimetre case made from 18-carat 5N gold, a silver-plated dial, black hands and a black alligator leather strap, and is limited to 100 watches.
18 ct 5N gold case Diameter 45.0 mm Height 17.4 mm Screw in crown See-through sapphire glass back Water resistance 12 bar
89801 Calibre IWC-manufactured movement Automatic, self-winding 68 hours Power Reserve Frequency 28800.0 vph (4.0 hz) 474 Components 51 Jewels Côtes de Genève, perlage
Perpetual calendar with large double-digit displays for date and month and leap year display Chronograph function with hours, minutes and seconds Hour and minute counters combined in a totalizer at 12 o’clock Flyback function Sapphire glass, convex, antireflective coating on both sides Rotor in 18-carat 5N gold Small hacking seconds Limited to 100 pieces
Silver-plated dial with luminescence
Black alligator leather strap Strap width 22 mm