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IWC Portofino Automatic Moon Phase 40mm Goes Golden with Ref. IW459403

IWC Portofino Automatic Moon Phase

IWC are so synonymous with pilot’s watches and the sporty Ingenieur that their dress watch collections sometimes fly under the radar. However, there’s no risk of that for their latest addition to the Portofino Automatic Moon Phase series, the Ref. IW459403. It’s the first 40mm gold model to join the range.

Currently the Portofino Automatic Moon Phase is available in two sizes, 37mm or 40mm with four of the five references featuring steel cases. Before today’s launch, the only gold version was at 37mm with a diamond-set bezel. Now though the 40mm gold edition offers the precious metal at the larger size without any diamonds across the bezel or dial, giving it much more luxurious look without leaning into the diamonds more at home on explicitly women’s watches. At 40mm it has a lot of presence but isn’t exactly a giant, ensuring it remains appropriately unisex.

IWC Portofino Automatic Moon Phase

The display is classically dress watch in style too with a combination of Roman numerals and slim baton hour markers alongside a minimalist minute scale. To match the golden case, the hands and markers are all gold plated while the dial itself is silver-plated. The focus of the piece is obviously the moonphase complication at 12 o’clock. It features a blue, night sky background decorated with golden stars and a gold moon. Moonphases are regarded as one of the most elegant decorative complications and this one looks great without rocking the boat.

Powering the IWC Portofino Automatic Moon Phase Ref. IW459403 is the calibre 35800, an automatic movement with a 50-hour power reserve. It’s protected by a solid, gold caseback that’s inscribed with some of the watch’s specs including its 30m water resistance rating, enough to protect it from a bit of light rain.

IWC Portofino Automatic Moon Phase
IWC Portofino Automatic Moon Phase

In terms of price, it’s £16,800, which is a reflection of the ever-rising cost of gold at the moment. This is one of the most archetypical dress watches I’ve seen in a while, ticking every genre box right down to the alligator leather strap.

Price and Specs:

Model: IWC Portofino Automatic Moon Phase
Ref: IW459403
Case: 40mm diameter x 11.1mm thickness, 18k 5N gold
Dial: Silver-plated, gold-plated indices
Water resistance: 30m (3 bar)
Movement: IWC calibre 35800, automatic
Frequency: 28,800 vph (4 Hz)
Power reserve: 50h
Functions: Hours, minutes, seconds, moon phase
Strap: Black alligator leather strap with 18-carat 5N gold pin buckle
Price: £16,800

More details at IWC.

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About the author

Michael Sonsino

As Digital Editor for Oracle Time, Michael needs an eye for detail, which makes it a good thing that his twin joys in life are miniatures and watches. He's a lifelong fan of fine timepieces, especially those of a more historic nature - if it has a twist of Art Deco, all the better. Recent purchase: Seiko Prospex 1959 Alpinist Modern Re-Interpretation. Grail watch: Vacheron Constantin Historiques American 1921.