Ingenieur 500,000 A/m 3508 — Steel and Gold

IWC 37590

Inherently antimagnetic ETA 2892-based calibreCaliberThe designation of a watch movement, identifying its design or movement family. with a niobium-zirconium balance springBalance springThe fine spiral spring that works with the balance wheel to form the movement’s oscillator., amagnetic pallet fork and ruby roller rotorRotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. bearings; survived 3,900,000 A/m in a tomograph without a Faraday cage. So few balance springs passed testing that production stopped.

Automatic · Introduced 1989 · 21 jewels