The short answer
Two things give a replica IW371775 away at arm's length: the spacing of the two subdials and the finish on the applied numerals. Get those right and the watch reads correctly from across a table. Get them wrong and no movement upgrade will rescue it. So when I look at listings, I start at the dial and work inward, never the other way round.
What the reference is meant to be
The IW371775 belongs to the Portugieser Chronograph family. Stainless steel, 41mm across, roughly 13mm thick, with a bicompax dial: running seconds at 6 o'clock and the chronograph minute counter at 12. Leaf-shaped hands, applied Arabic numerals, a fine railway minute track, and a bezel narrow enough that the dial looks larger than the number suggests. Current production runs an in-house automatic chronograph caliber with a column wheel and vertical clutch. That last detail matters, because it dictates which base movements a replica can plausibly use.
The three tiers you will actually see
- Under about $150: quartz or a rough 21-jewel automatic. Pushers feel like buttons on a jacket. Subdials are often decorative or wrong in function.
- $250 to $450: the honest middle. Usually an Asian 7750 base, which genuinely suits this layout since the Valjoux family already places counters at 12 and 6. Expect extra thickness and a busier rotor.
- $600 and up: the tier people mean when they say super clone. Closer case profile, better anti-reflective coating, smoother chronograph engagement, sharper dial printing.
Dial and hands
Subdial spacing is the first tell. On the genuine layout the two counters sit close to the center, leaving the outer track clean and uncluttered. Cheap builds shrink the subdial discs or push them outward, and the whole dial suddenly looks hollow. Look at the concentric snailing inside each counter as well, since stamped flat discs are obvious under a lamp. The numerals should be applied, polished, and faceted on the edges, not printed or glued on flat. Font weight is subtle: the branding should be crisp and thin, and if it looks bold or blurry, the printer was cutting corners.
Case, crown, pushers
Check where brushing meets polishing. The Portugieser case is mostly brushed on the flanks with polished edges, and replicas frequently polish too much. The crown should be easy to grip without being oversized. Pushers should travel smoothly and spring back with a clean snap. On the back, engraving depth and crispness tell you a lot about the tooling used.
Movement and function
Ask for a video of the chronograph starting, running for a minute, and resetting. A hand that stutters on reset, or a minute counter that jumps two minutes, is a warning. On 7750-based builds, listen for rotor wobble and check that winding feels smooth rather than gritty. A movement that keeps time but feels cheap in the hand is still a compromise you should price in.
Strap, clasp, and water
Most arrive on an alligator-grain leather strap. Look at the stitching density and the buckle engraving. Assume the gaskets have never been tested, so keep it away from swimming and showers regardless of what the listing claims.
Quick pre-purchase checklist
- Subdials close to center, correct function at 12 and 6.
- Applied numerals with visible facets.
- Crisp, thin branding rather than heavy print.
- Chronograph resets to zero in one snap.
- Case flank brushing looks like brushing, not mirror polish.
- Seller provides a running video, not just stock photos.
None of this is about the logo on the dial. It is about whether the watch behaves like the object it copies. A replica IW371775 that nails the dial geometry and runs a decent chronograph is a satisfying wear. One that misses the dial is a constant annoyance, no matter what the movement spec sheet says.