The IWC Portofino Automatic Day & Night 34 in gold is reference IW659802: a 34 mm 18 ct 5N gold watch with a silver-plated dial, diamond details and a taupe calfskin strap. Its day-and-night display is a 24-hour indicator, not a moonphase. IWC’s UK product page lists an automatic movement with a 50-hour power reserve and 5 bar water resistance.
What is the gold Portofino Day & Night 34?
IW659802 is the gold version of IWC’s Portofino Automatic Day & Night 34. The reference pairs an 18 ct 5N gold case with a silver-plated dial and taupe calfskin strap fitted with IWC’s quick-change system. The watch measures 34 mm across and 8.9 mm high, with a listed strap width of 16 mm. IWC’s UK product listing confirms these specifications.
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IWC’s September 2022 launch release describes the gold version as having 54 diamonds on its case and 12 on its silver-plated dial, alongside gold-plated hands and appliqués. The same release describes the family’s day-and-night mechanism. IWC’s collection announcement is dated 8 September 2022.
How does the Day & Night display work?
A disc at 6 o’clock completes one rotation every 24 hours. Its sun or moon imagery indicates whether the display is in its day or night portion; IWC says the sun or moon appears in the upper area at noon or midnight. This is a day-and-night indication, not a moonphase complication: it does not describe the changing phases of the Moon.
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Specifications for reference IW659802
| Specification | Detail |
|---|---|
| Reference | IW659802 |
| Case | 18 ct 5N gold |
| Diameter / height | 34 mm / 8.9 mm |
| Dial | Silver-plated; 12 diamonds, according to IWC’s 8 September 2022 release |
| Case diamonds | 54, according to IWC’s 8 September 2022 release |
| Hands and appliqués | Gold-plated, according to IWC’s 8 September 2022 release |
| Strap | Taupe calfskin with quick-change system; 16 mm listed width |
| Movement | Automatic calibre 35180 |
| Power reserve | 50 hours |
| Frequency / jewels | 28,800 vph (4 Hz) / 24 |
| Water resistance | 5 bar |
| Glass | Convex sapphire with anti-reflective coating on both sides |
Unless specified otherwise, measurements and movement details in the table are from IWC’s UK product listing. The diamond count and gold-plated finishing are from the dated 2022 launch release.
How it differs from the steel Day & Night 34
The gold reference is IW659802. IWC’s 2022 announcement identifies two steel variants in the same collection, but they are not interchangeable reference numbers or the same material-and-colour configuration.
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- IWC Da Vinci Automatic Unisex Watch IW459306
| Reference | Material and configuration described by IWC |
|---|---|
| IW659802 | 18 ct 5N gold, silver-plated dial, taupe calfskin strap; 54 case diamonds and 12 dial diamonds |
| IW659801 | Steel, blue dial and blue calfskin strap |
| IW459801 | Steel, silver-plated dial and taupe calfskin strap |
The steel configurations and their colours come from IWC’s 8 September 2022 release. The current UK listing for IW659802 separately confirms the gold reference’s specifications. A later IWC Le Petit Prince Day & Night release concerns steel reference IW459806, not this gold watch; it should not be mistaken for IW659802. IWC’s 14 April 2026 release identifies that separate edition.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.UK price and where to check availability
IWC’s UK product page displayed a price of £20,100 including VAT when checked for this article. That is a UK listing, not a global price, and prices and availability can change; check the current listing for your market. IWC’s 2022 release named IWC boutiques, authorized retail partners and IWC.com as sales channels at that time, but it does not establish current stock at any particular location.
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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.
