IWC · Manual Wind

59210

An eight-day hand-wound calibre introduced in 2011 with the Portofino Hand-Wound Eight Days. Two mainspring barrels supply the reserve, tracked by a retrograde indicator on the dial at eight o'clock. The balance is free-sprung — no regulator index, adjusted instead by four gold weights set into the rim — and runs against a Breguet overcoil hairspring. Small seconds sit at six and the date at three.