Originally inspired by Mediterranean elegance and classical watchmaking, the Portofino collection brings timeless dress-watch refinement. The Portofino Automatic Moon Phase IW459403 pairs a polished 40.0 mm 18k 5N gold case with a silver-plated dial and a discreet moon-phase complication at 12 o’clock. The dial’s gold-plated hands and applied hour markers harmonise with the warm tone of the gold case, emphasising its dress-watch character.

Under the hood, the self-winding calibre 35800 powers the watch, offering a reliable 50-hour power reserve and a frequency of 28,800 vph (4 Hz). A solid gold caseback conceals the movement, preserving the watch’s clean aesthetic. Finished with a black alligator leather strap and gold pin buckle, the IW459403 elegantly combines precious materials, classical design and subtle complications.

Technical Details

Case – 18k 5N gold case

Diameter – 40.0 mm

Height – 11.1 mm

Dial – Silver-plated dial with moon-phase display at 12 o’clock

Caseback – Solid gold caseback (engraved)

Crown – Standard crown

Water Resistance – 3 bar (30 metres)

Calibre – IWC calibre 35800

Movement Type – Automatic winding

Power Reserve – 50 hours

Frequency – 28,800 VPH (4 Hz)

Jewels – 25

Features – Hours, minutes, central seconds; Moon-phase indicator; Convex sapphire crystal with antireflective coating on both sides; Engraved caseback with specifications (including water resistance)

Strap – Black alligator leather strap with 18k 5N gold pin buckle