Portofino Automatic Moonphase Red Gold / Silver

Ref. IW4594-03

The IWC Portofino Automatic Moon Phase IW4594-03 debuted in 2025. This model features a 40 mm case in 18k red gold, fitted with a sapphire crystal and a solid caseback. Water resistance is 30 meters. It is delivered on a black alligator leather strap. The dial is silver-plated, paired with gold-plated feuille hands and gold-tone applied markers. The moon phase display is positioned at 12 o’clock. Power comes from the self-winding caliber 35800, which has a diameter of 25.6 mm, thickness of 4.8 mm, and a power reserve of 42 hours. The movement beats at 28,800 vph (4 Hz) and contains 25 jewels. Functions include hours, minutes, central seconds, and moon phase.

Release year

2025

Case diameter

40 mm

Thickness

9.5 mm

Lug width

20 mm

Water resistance

30 m

Case material

Red Gold

Crystal

Sapphire

Dial

Silver

Movement

IWC caliber 35800

Movement type

Automatic

Display

Analog

Power reserve

42 h

Frequency

28800 vph

Jewels

25

Movement diameter

25.6 mm

Complications

Hours, Minutes, Moonphase, Seconds