The replica IW371629 is a copy of the IWC Portugieser Chronograph, a 41mm stainless steel watch with a two-register dial and a slim bezel. Replicas of this reference sell in three bands, and the gap between a cheap build and a good one shows in the dial printing, the case thickness, and the movement inside. This guide covers what the original uses, what the copies use, and how to judge one before you pay.
What the original IW371629 is
IWC builds the Portugieser Chronograph around a 41mm steel case and the caliber 69355, an automatic chronograph with a 46-hour power reserve. The dial uses a bi-compax layout: running seconds at 6 o'clock and a 30-minute counter at 12. Reference numbers in the 3716 family change with dial color, strap, and market, so IW371629 is one variant among several siblings.
- Case: stainless steel, about 41mm wide and 13mm thick
- Movement: IWC caliber 69355, automatic, 46-hour reserve, 28,800 bph
- Dial: two registers, applied numerals, leaf hands, date at 3
- Crystal: domed sapphire with anti-reflective coating on both faces
- Strap: alligator leather on a steel pin buckle
- Water resistance: 30 meters
Which movement sits inside a replica IW371629?
Builders solve the two-register layout in three ways, and the movement choice decides both the price and how the watch sits on the wrist.
Modified Asian 7750
The 7750 family is the workhorse of the replica chronograph market. To match the Portugieser dial, builders move the running seconds to 6 and the chronograph minutes counter to 12, then engrave the rotor to mimic the IWC 69355 look. It runs at 28,800 bph, winds itself, and adds about 1mm of thickness over the genuine profile.
Hand-wound column-wheel copies
Some builds use a hand-wound column-wheel design copied from older Swiss architecture. The chronograph starts with a light push and the case stays thinner. You trade that for daily winding and a shorter power reserve.
Quartz
Quartz copies cost the least and look the worst. The subdials often do nothing, the seconds hand ticks once per second, and the case finishing is thin. Skip them if the watch is meant to read like the real thing on the wrist.
How close is the replica to the genuine watch?
A well-made copy gets the silhouette right. The dial layout, applied numerals, leaf hands, and thin bezel all match at normal reading distance.
What good replicas get right
- Dial layout: small seconds at 6, chronograph minutes at 12, date at 3
- Case shape: round steel case with straight lugs and a narrow bezel
- Dial furniture: applied numerals and a printed minute track on the top tiers
- Crystal: sapphire with coating on the top face
Where replicas fall short
- Thickness: the movement swap pushes most copies past 13.5mm
- Movement finish: engraved plates instead of hand-finished bridges
- Coating: inner anti-reflective coating is missing on many builds
- Strap: stock leather is stiff and thin next to the original alligator
- Caseback: engraving on cheap tiers is shallow and soft
What do replica IW371629 watches cost?
Price tracks the movement, the case set, and how much hand work went into the dial. Wholesale sellers work in three bands.
- Entry, $80 to $150: quartz or a basic automatic, stamped case, printed dial
- Mid, $200 to $350: modified Asian 7750, working chronograph, sapphire crystal
- Top, $400 to $700: hand-wound or upgraded automatic, closer case thickness, sharper dial furniture
Quality checklist before you buy
- Ask for the movement name and the case thickness in millimeters.
- Request a straight-on dial photo. The seconds subdial should sit at 6, the counter at 12.
- Ask how the pushers feel. They should click firm and return on their own.
- Look at caseback engraving in raking light. Sharp edges point to a better case set.
- Confirm the crystal has coating. A flat, dull reflection points to plain glass.
- Check the lug width so a replacement strap will fit.
- Buy from a seller who shows the watch running on video, not stock photos alone.
Sizing and daily wear
The 41mm case wears like a dress watch, so it slides under a cuff and suits a 6.5 to 7.5 inch wrist. The original ships on alligator leather, and most buyers swap the stock strap for a better one within weeks. Leather is the right pairing here; a steel bracelet changes the character of the watch.
Common questions about the replica IW371629
Does the chronograph work on a replica IW371629?
On automatic and hand-wound builds, yes. The start, stop, and reset pushers drive real chronograph functions. On quartz copies the subdials are decorative.
Can I swim with it?
No. The genuine watch is rated to 30 meters, which covers rain and hand washing only. Replica seals are less dependable, so keep it away from pools and showers.
How do I spot a low-grade copy?
Start with the subdials. If the seconds hand at 6 ticks once per second, the movement is quartz. Then check the thickness, the crystal reflection, and the crispness of the caseback engraving.
Is the replica IW371629 worth buying?
It comes down to what you want from the watch. If you like the Portugieser design and the price of the original is out of reach, a mid-tier build delivers the look and a working chronograph. If you want genuine movement finishing or service history, no replica provides that.