IWC Portofino Chronograph 39 Steel — Silver-Plated Dial | Ref. IW391407

The marriage of the chronograph function with the Portofino's dress-watch sensibility is a proposition that demands careful calibration. At 39 mm in diameter and 12.7 mm deep, the IW391407 navigates this balance with characteristic IWC assurance — compact enough for formal occasions, substantial enough for the stop-seconds function to feel purposeful rather than decorative. The stainless steel case, with its polished flanks and gently curved lugs, establishes the Portofino grammar while accommodating the additional crown and pushers that chronograph architecture requires.

Calibre 79350 is a column-wheel automatic chronograph movement of proven lineage, delivering flyback-adjacent precision in its start-stop-reset sequence with approximately 44 hours of power reserve. The silver-plated dial maintains Portofino's characteristic clarity despite the addition of two subsidiary registers — a layout exercise in which the indices, hands, and recessed chronograph counters achieve legible hierarchy without visual congestion. The integration of classical register proportions with the clean Portofino background reflects IWC's design discipline, where every element earns its presence.

A blue alligator leather strap introduces a note of contemporary colour that lifts the silver dial combination from convention, referencing the Mediterranean coastal leisure that inspired the Portofino name while remaining refined enough for metropolitan wear. Convex sapphire crystal with bilateral antireflective coating and 3-bar water resistance complete the specification. The IW391407 is the instrument of choice for the collector who requires chronograph precision but refuses to surrender the elegance of dress-watch proportions — a watch that performs as well at a regatta as at a client dinner.