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The IWC Portofino Complete Calendar 41 is a 41 mm dress watch with a calendar display split across two subdials. Its “complete” calendar shows the weekday, date, month and moon phase, but it is not perpetual: the wearer must correct the date after months with fewer than 31 days. Introduced in steel and 18-carat 5N gold, the watch uses IWC’s calibre 32150 with a newly developed 69-component calendar module.
What the Portofino Complete Calendar displays
IWC introduced the Portofino Complete Calendar 41 on 9 February 2023, in two versions: stainless steel reference IW359001 and 18-carat 5N gold reference IW359002. IWC calls it the first watch to use its newly developed complete-calendar module. IWC’s product page describes the display as designed for quick reading.
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- At 12 o’clock: the upper subdial combines the weekday and moon phase.
- At 6 o’clock: the lower subdial combines the date and month.
IWC says the indications are driven by separate gear trains and can be adjusted independently. The module contains 69 components and is integrated into the IWC-manufactured 32150 calibre.
How to read and adjust the complete calendar
In ordinary months, the calendar indications progress together. Because the mechanism does not account automatically for every month length, it needs a correction after a month with fewer than 31 days.
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- Model IW391031
- On the final day of a month shorter than 31 days, use the crown to set the date to position 31.
- The calendar indications then advance simultaneously overnight, according to IWC’s instructions.
The separate gear trains also allow the individual indications to be adjusted independently. For crown operation and setting details, consult the instructions for the specific reference.
Complete calendar versus perpetual calendar
“Complete” describes the range of calendar information shown here; it does not mean the calendar will remain correct indefinitely without intervention. A perpetual calendar accounts for different month lengths and leap years, while this Portofino requires the short-month correction above. Monochrome’s 2023 launch report also distinguishes the two types on that practical basis.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Steel and 18-carat 5N gold versions
| Detail | Steel IW359001 | 18-carat 5N gold IW359002 |
|---|---|---|
| Case material | Stainless steel | 18-carat 5N gold |
| Dial and hands | Silver-plated dial; gold-colored hands | Silver-plated dial; gold-colored hands |
| Applied markers | Gold-plated appliques | Solid-gold applied markers |
| Strap | Blue traceable Swiss calf leather | Taupe traceable Swiss calf leather |
| Launch price reported in February 2023 | CHF 10,500, inclusive of taxes, according to Monochrome | CHF 20,500, inclusive of taxes, according to Monochrome |
The CHF amounts are historical launch prices, not current quotes. IWC’s page gives the same case dimensions for the collection: 41 mm in diameter and 11.75 mm high. The calibre is visible through a sapphire-glass back; IWC notes blued screws and a gold-plated rotor.
Specifications and launch availability
IWC’s product page lists the case dimensions and movement details above. Separately, Monochrome’s February 2023 launch report lists a 72-hour power reserve, 50 m water resistance, 21 jewels, 28,800 vibrations per hour and a folding clasp. Those figures are launch-report specifications; check current documentation for the reference before relying on them as present official specifications.
IWC says the watch became available from February 2023 through its boutiques, authorized retail partners or IWC.com. Monochrome reported availability from April 2023. These descriptions differ in timing, and neither establishes current stock. Consult IWC or an authorized retailer for present availability and local pricing.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
