Ingenieur 500,000 A/m 3508

Skinny-case Ingenieur whose calibreCaliberThe designation of a watch movement, identifying its design or movement family. 37590 resists 500,000 A/m by its own materials, without a soft-iron cage; case and dial are marked with the rating, and the lightning logo was dropped for the text. Balance-spring yields were so poor that IWC lost money and stopped. Steel on bracelet or strap, some with gold bezelBezelThe frame surrounding the crystal at the front of a watch. or two-tone bracelet.