IWC has been transitioning to in-house movements since 2000, enhancing the reputation and technical features of their watches. In 2011, IWC introduced the Cal. 59000 family of hand-wound eight day movements. This family features a single barrel and mainspring and ticks at a modern 4 Hz, making the long 192 hour power reserve extremely impressive.
Cal. 59360, introduced in 2015 in the IWC Portofino Hand-Wound Monopusher, is the only member of this family with a chronograph complication. The movement had been revealed in 2013 at SIHH but was withdrawn before sale and reappeared two years later on a special edition Unique Portofino Hand-Wound Monopusher Edition "Tribeca Film Festival 2015".
Although IWC's contemporary Cal. 89000 family of chronographs was introduced just a few years before, it is a compact, conventional automatic movement with twin pushers. For the Portofino, IWC wanted a classic monopusher design in a large movement befitting the massive diameter of the Portofino case. The chronograph is implemented as a module on Cal. 59215 and features a column wheel yet is only 1 mm thicker than the base movement.
The chronograph mechanism in Cal. 59360 is quite unusual in design. It features a rocking pinion to engage the seconds wheel in the base movement rather than the vertical clutch found on many other high-end chronographs. Another classic and important element is the sautoir, which allows the chronograph minutes hand to jump instantaneously rather than advance continually with the seconds hand.
IWC 59000 Movement Family
- Main Article: IWC 59000
|Movement||Year Introduced||Jewels||Central Hands||Small Seconds||Power Reserve Indicator||Calendar||Special Features||Example Watch|
|IWC 59210||2011||30||Hour and minute||Yes||8:00||Date||N/A||IWC Portofino Hand-Wound Eight Days|
|IWC 59060||2015||30||Hour and minute||No||Back||No||N/A||IWC Portofino Pure Classic|
|IWC 59215||2013||30||Hour and minute||Yes||Back||Date||N/A||IWC Portofino Hand-Wound Eight Days|
|IWC 59230||2013||30||Hour and minute||Yes||8:00||Big date||N/A||IWC Portofino Hand-Wound Big Date|
|IWC 59220||2015||30||Hour and minute||Yes||8:00||Big date and Day by pointer||N/A||IWC Portofino Hand-Wound Day & Date|
|IWC 59235||2018||30||Hour and minute||Yes||Back||Big date||N/A||IWC Big Pilot's Watch Big Date|
|IWC 59360||2015||36||Hour and minute||Yes||8:00||Date||Column wheel monopusher chronograph||IWC Portofino Hand-Wound Monopusher|
|IWC 59800||2015||30||Hour and minute||Yes||8:00||Date||Moon phase indicator||IWC Portofino Hand-Wound Eight Days Moonphase|
|IWC 59900||2017||30||Hour and minute||Yes||3:00||Date by pointer||Tourbillon||IWC Portofino Hand-Wound Tourbillon Rétrograde Red|
- Central hours, minutes, chronograph seconds
- Small seconds at 6 00
- Date window at 3 00
- Power reserve indicator at 8 00