An IW371640 replica is a copy of the IWC Portugieser Chronograph, a 41 mm steel watch with two subdials and an automatic chronograph movement. The best copies match the case proportions, dial layout, and subdial positions of the original. Budget copies miss the thickness, run quartz, and look wrong up close.
IWC Replica IW371640: What to Check Before You Buy
What the original IW371640 looks like
Reference IW371640 belongs to the Portugieser Chronograph line that IWC has produced since the late 1990s. The case measures about 41 mm across and 13 mm thick, with lugs that curve down toward a thin bezel. The dial carries two subdials, chronograph minutes at 12 and small seconds at 6, plus a date window and applied Arabic numerals.
Inside sits the in-house calibre 69355, an automatic chronograph with about 46 hours of power reserve. Water resistance is rated at 30 meters, which covers rain and hand washing but not swimming.
- Case: stainless steel, about 41 mm wide and 13 mm thick
- Dial: two subdials, date window, applied numerals
- Crystal: domed sapphire with anti-reflective coating on both sides
- Movement: calibre 69355, automatic, about 46 hours of reserve
- Water resistance: 30 meters
- Strap: leather with a steel pin buckle
Replica grades explained
Makers sell this reference at three levels, and the price gap between them shows on the wrist as much as in photos.
- Budget tier. Quartz movement, mineral glass, stamped dial, and a case that runs 1 to 2 mm too thick. Fine as a costume piece, easy to spot in the hand.
- Mid tier. Asian automatic chronograph, sapphire on the front, printed or thin applied numerals. The case profile comes close, but the pushers feel spongy and the rotor is loud.
- High tier. Often sold as a super clone. A movement built to fit the original case dimensions, sapphire on both sides, applied numerals with polished edges, and correct subdial spacing. This is the tier that reads as genuine from arm's length.
Which movement sits inside an IW371640 replica?
The movement sets the case thickness more than any other part, so ask about it first.
- Quartz. Runs the subdials off a battery. The chronograph seconds hand ticks once per second, and reset snaps instead of sweeping back.
- Automatic based on a Valjoux 7750. A proven chronograph with a wobbling rotor. It adds thickness, and the subdial functions often sit in a different order than the original.
- Custom-cased clone. Built around the original layout, so the subdials land in the right place and the case stays thin. The pushers feel closer to the real thing.
What should you check before you buy?
Ask for photos and video of the actual watch, not stock images. A seller who has it in hand can show all of these in one clip.
- Case thickness: compare the side profile with a reference photo, or request a caliper shot.
- Subdial positions: chronograph minutes at 12, small seconds at 6. Swapped subdials are the easiest tell.
- Dial printing: numerals should be applied metal, and the minute track should stay crisp under magnification.
- Hand stack: hour, minute, and chronograph hands at different heights, with no scraping.
- Pusher feel: a firm click on start and stop, with a smooth reset. Mushy pushers point to a cheap mechanism.
- Crystal: sapphire with a faint anti-reflective tint. Deep scratches after light wear mean mineral glass.
- Caseback engraving: sharp lettering, correct reference, no blurry laser etching.
- Lume: charge it under a lamp for 30 seconds. Weak or patchy glow means poor application.
What does an IW371640 replica cost?
Prices cluster into three bands, and the movement sets the floor.
- Quartz tier: about $80 to $150
- Mid automatic tier: about $200 to $350
- High-end clone: about $400 to $700, more with a decorated clone movement and a leather strap upgrade
A price far below the band for a given tier often means the listing is not the watch in the photos. Request a timestamped video before you pay.
Living with a replica chronograph
- Keep it out of the pool. A 30-meter rating is splash protection even on the genuine watch.
- Press start, then stop, then reset. Never reset a running chronograph.
- Service the movement every 4 to 6 years, or when it starts losing time each day.
- Store it with the chronograph stopped and the crown pushed in.
Frequently asked questions
Is an IW371640 replica worth buying?
If you want the Portugieser look without the five-figure price, a high-tier replica gets you close. If you care about resale value, service support, or long-term accuracy, a used entry-level chronograph from another brand is the better spend.
How can you tell a replica from the real thing?
Look at the caseback, the subdial spacing, and the pusher click. Genuine watches stay thin, show a finished in-house movement through the display back, and reset with a clean snap.
Do replica chronographs hold up with everyday use?
A 7750-based or custom clone movement can run for years with light use, but the chronograph adds wear. Use the stopwatch when you need it and keep the watch away from water and hard knocks.
Can a jeweler service a replica?
Many independent watchmakers will service a common Asian chronograph movement, though some refuse replica work. Ask before you buy, and expect the service bill to land near the price of the watch itself.
Making the decision
- Want the look with low risk: mid-tier automatic.
- Want the closest match to the genuine profile: high-tier clone with a custom-cased movement.
- Want accuracy and parts support: skip replicas and buy a used chronograph from a brand with parts on the shelf.