IWC · Manual Wind

59215

A revision of the 59210 in which the power-reserve indicator moves off the dial and onto the back of the movement, leaving the Portugieser Hand-Wound Eight Days an uninterrupted front. The mainspring holds closer to nine days, but a stop releases exactly 192 hours of it, so the watch never runs on the weak end of the torque curve. Free-sprung balance and Breguet hairspring carry over unchanged.