Cal. 59360 is an hand winding modular monopusher chronograph movement produced by IWC starting in 2015.
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 The movement had been revealed in 2013 at SIHH but was withdrawn before sale and reappeared two years later on a special edition Unique Portofino Hand-Wound Monopusher Edition "Tribeca Film Festival 2015".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.
| 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 |
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