Ingenieur SL Perpetual Calendar / English

In Context

At 34.5 mm it is classically proportioned: the size a dress watch was understood to be for most of the twentieth century, and small enough to sit under a cuff. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. Rated to 30 m, it is protected against rain and splashes and nothing beyond that.

The movement winds itself from the motion of your wrist. 42 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

IW9245-03 stands on its own in this catalogue — no other reference here shares its base number. It pairs a white dial with a yellow gold case. Beyond the time it carries a perpetual calendar.

Movement based on ETA 2892-A2, fitted with perpetual calendar module by Kurt Klaus. Successor to the 3575. Replaced the 35780.

1 other watch in the library runs the IWC 35782.

IWC

Ingenieur SL Perpetual Calendar / Strap / English

IW3540-03 · 34.5 mm