A replica iw371689 is a copy of the IWC Portugieser Chronograph, a 41 mm stainless steel chronograph with a two-register dial. The best builds match the case profile, dial spacing, and leaf-shaped hands, while weak builds get the proportions and the subdial positions wrong. If you are shopping for one, the deciding factors are case finishing, dial print quality, and the movement inside.
What the IW371689 Reference Is
The IW371689 sits in the Portugieser Chronograph 41 family, the line that replaced the older 3714 series. It keeps the signature layout: a clean dial with one counter at 12 o'clock and small running seconds at 6 o'clock, slim lugs, and a thin polished bezel over a brushed case. Approximate published specs for the family include a 41 mm diameter, a thickness near 13 mm, a 20 mm lug width, sapphire crystal with anti-reflective coating, and the in-house calibre 69355 with roughly a 46-hour power reserve. Confirm the exact numbers for your reference on the manufacturer's official product page before you compare a copy against it.
Movement Options You Will See
- Quartz: the lowest tier. Accurate and cheap, but the sweep is wrong and the case is usually thinner than the original.
- Automatic with a transfer plate: the common mid and top tier. A transfer module moves the running seconds to 6 and the chronograph counter to 12, which is the layout a genuine Portugieser uses.
- Modified clones: the closest visual match, with better finishing on the rotor and bridges. These cost more and are harder to service.
Ask directly what powers the watch. A seller who cannot name the movement is a seller to skip.
Case, Crystal, and Dial Checks
- Case profile. The step between the bezel and the case flank should be crisp, with polishing on the top surfaces and vertical brushing on the sides.
- Crystal. Sapphire with coating on both faces gives a faint blue tint. A purple or milky cast usually means mineral glass.
- Dial. Applied numerals should sit flat and catch light at the edges. The minute track and the polished rings around each subdial are where cheap prints fall apart.
- Hands. Leaf-shaped hour and minute hands, a slim chronograph hand, and a counterweight that lines up with the center of the dial.
- Caseback. Engraving depth and font weight vary a great deal. Compare letter shapes, not just the text.
Strap and Buckle
The original ships on alligator or calf leather with a pin buckle or folding clasp. On a replica iw371689, check the stitching density and the strap thickness at the lugs. Thin, glossy leather is the easiest shortcut to spot. A folding clasp should close with a firm click and sit flush.
Price Tiers and What They Tell You
Entry builds use mineral glass, a basic automatic or quartz movement, and printed dial markers. Mid-tier builds add sapphire, better brushing, and a properly finished caseback. Top-tier builds focus on the small things: correct subdial spacing, sharper dial print, and a movement layout that matches the original. Price alone is not proof of quality, so judge each example on its own details.
Inspection Checklist Before You Buy
- Ask for photos at 12, 3, 6, and 9 o'clock, plus a straight-on dial shot.
- Request a short video of the chronograph starting, stopping, and resetting to zero.
- Confirm the case diameter and thickness with calipers if the seller can provide numbers.
- Check that the subdials sit at 12 and 6, not at 9 and 3.
- Review the return policy before paying, including who covers shipping.
Care and Ownership Notes
Treat water resistance as a claim, not a guarantee. Keep any replica away from swimming, showers, and steam, and wipe the case with a soft cloth after wear. Automatic chronographs benefit from a service every few years if you wear them often, and a watchmaker who works on generic chronograph movements is usually the practical choice. Store the watch on a soft surface so the crystal and bezel do not pick up scratches.
Common Questions
Is a replica iw371689 waterproof?
Assume it is not. Even when a listing claims 30 meters, gaskets on copies are not tested to that standard, so keep it dry.
How close is a good copy to the original?
A top-tier build is close on the wrist at arm's length. Under a loupe, differences in dial print, hand finishing, and caseback engraving still show.
What size wrist does it suit?
The 41 mm case with 20 mm lugs wears well on wrists from about 6.5 to 7.5 inches, similar to the genuine reference.