Built around the IW459402 reference, this replica Portofino IW459402 40mm features a blue sunburst dial paired with the Portofino moon phase complication in a stainless steel 40mm case. The deep blue surface shifts between cobalt and dark navy depending on ambient light, a behavior that sets sunburst-finished dials apart from flat-painted alternatives. IWC placed the moon phase aperture at 12 o’clock and the combined small seconds and date register at 6 o’clock, maintaining the vertical symmetry that defines this generation of Portofino references.

Case & Movement Specs

• Case diameter: 40mm
• Case material: stainless steel
• Dial: blue sunburst finish
• Complications: moon phase at 12, small seconds with date at 6
• Crystal: domed sapphire with anti-reflective coating
• Strap: blue alligator leather with pin buckle
• Movement: automatic

The domed sapphire crystal curves gently over the dial edge, which adds perceived depth and makes the moon phase disc appear to sit beneath the dial surface rather than flush with it.

Caliber Breakdown

Inside the case sits the same automatic caliber used across the Portofino moon phase range. It delivers hours, minutes, moon phase tracking, and a small seconds function with integrated date. The movement architecture keeps the case profile slim, which is essential for a 40mm dress watch that needs to slide under a shirt cuff. The iwc portofino automatic platform shared across references means parts and service consistency, a practical consideration beyond aesthetics. See the black-dial chronograph IW391008 for a sportier alternative, or browse the full Portofino collection for the complete reference range.

How It Compares

The IW459402 exists alongside the silver IW459401 and rose gold IW459403 as part of a three-reference moon phase group within the Portofino line. Among the three, the blue dial version generates the strongest visual presence while staying within dress-watch proportions. Blue sunburst finishes have become a dominant trend across brands, and IWC’s execution on this reference keeps the effect refined rather than flashy. This replica Portofino IW459402 40mm remains the go-to Portofino moon phase for buyers who want color without stepping into precious metal pricing territory.