This reference has a few things worth understanding before acquisition — movement architecture, finishing tier, market context, and practical daily wear notes. All covered below.
The IWC Portuguese Chronograph Stainless Steel IW371605- 1:1 has a collector following that understands exactly where this reference sits in the superclone hierarchy — and that understanding comes from handling multiple examples across different production runs. This review reflects that kind of accumulated knowledge rather than a first-look impression.
The 40.0MM case is built in stainless steel, following the original reference geometry across lug width, case band, and crown placement without the dimensional shortcuts that lower-tier production accepts.
The anti-reflective coating on the crystal creates the dial depth that cheaper builds lose under direct light, where an uncoated crystal reflects back and flattens the visual effect.
The with Functional Stopwatch feature like t drives the chronograph complication — pusher action, reset behaviour, and column wheel or cam engagement are the three criteria that separate a well-executed chronograph superclone from one that looks correct but feels imprecise. The function has been regulated for daily accuracy, not just factory demonstration.
The 50m water resistance rating handles rain and incidental water contact reliably — suited to the daily wear conditions the watch will actually encounter.
The with IWC markings and engravings with Po follows the dimensional proportions and surface finishing of the genuine reference — the details that affect both how the watch looks from a distance and how it feels across the wrist in extended daily wear.
Buyers comparing this with alternative references in the same brand family will find the movement architecture is the primary quality differentiator — the case design distinction is largely aesthetic while the movement specification directly affects ownership experience.
Who This Reference Suits
Versatility is this reference's strongest characteristic — it moves between formal and casual contexts without compromising either. The buyer who wants one daily driver that works across their full range of situations will find this more useful than a more specialised piece. It suits someone with a focused collection more than someone building breadth.
Market Context
Higher-grade sourced examples of this reference generally circulate in the $726–926 range among informed buyers. Well-sourced examples of this reference circulate at this tier of the collector market — the positioning reflects the movement specification, finishing quality, and overall build standard rather than the brand name alone. This figure is a market reference estimate for research purposes — ARFWatches does not sell or transact products directly.
Build quality updates and factory run comparisons for this reference are tracked at ARFWatches — the sourcing discussion there is the most reliable indicator of current availability.
Editorial Disclaimer: ARFWatches.com is an independent watch review and collector research platform. This page does not constitute an offer to sell any product. All market pricing figures are editorial estimates based on collector community data. Readers are responsible for ensuring compliance with the laws of their jurisdiction.