The Ingenieur SL Automatic, Reference 1832, is one of the best-known IWC’s racing watches. Designed by Gérald Genta in 1976, it featured his signature style, inspired by a traditional diving helmet. The SL was built around the IWC-manufactured 8541 ES calibre, which used antimagnetic materials in addition to a soft-iron inner case enabling it to resist magnetic fields of up to 80,000 A/m.
How far can engineer watches be pushed? IWC decided to find out in 1989 with the Ingenieur 500,000 A/m. The movement was built in part with niobium-zircon alloy, and withstood an incredible 3,700,000 A/m. It could actually have taken more, but it was a bit too far ahead of its time – instruments capable of measuring higher hadn’t been invented yet.
In 2013, IWC set the watch world ablaze with the Ingenieur Constant-Force Tourbillon. Its ceramic and platinum case contained the patented Constant-Force Tourbillon, a breakthrough in precision timekeeping. The double moon display on the dial contains images of the moon so detailed that the craters on the surface are visible, and the moon phase runs with a deviation of just a single day every 577 years.