Answer first
A replica IW371422 is a copy of the IWC Portugieser Chronograph ref. IW371422, a 40.9 mm steel chronograph with a leaf-hand dial, a 30-minute counter at 12 o'clock, running seconds at 6, and a date window at 3. Quality varies more than price does in this reference. Expect to pay roughly $300 to $900 depending on the movement and finishing, against about $8,000 for the genuine watch. The checks below separate a wearable copy from a throwaway one.
Numbers to compare
- Case diameter: 40.9 mm
- Case height: about 12.5 mm
- Lug width: 20 mm, tapering to 18 mm at the buckle
- Movement: automatic chronograph, 28,800 vph, 44 hours of reserve on the original
- Crystal: sapphire front and display back
- Water resistance: rated 3 bar on the original, which means splash resistance only
Inspection steps
- Measure the case with digital calipers and confirm 40.9 mm across, about 12.5 mm thick, and 20 mm between the lugs.
- Look at the dial and confirm the 30-minute counter sits at 12, running seconds at 6, and the date aperture at 3.
- Photograph the dial and zoom to 4x, then compare letter weight, spacing, and the height of the Schaffhausen line against a reference photo.
- Press the upper pusher to start, press it again to stop, and press the lower pusher to reset, listening for a clean snap.
- Run the chronograph for a full hour and watch whether the minute counter jumps at the correct mark rather than drifting.
- Set the watch against a reference clock and note the rate over 24 hours; a healthy 7750-based copy holds within about 15 seconds a day.
- Turn the watch over and study the rotor engraving, jewel settings, and bridge finishing through the display back.
- Flex the strap, then check stitch density, edge paint, and whether the buckle carries a crisp signature.
- Ask for a pressure test result before you wear the watch anywhere near water.
Red flags
- Subdials placed too far apart or crowding the date window
- Printed hour markers where applied metal markers belong
- Chronograph seconds hand that hesitates or stutters on start
- Caseback that lifts off instead of unscrewing
- Dial text that runs together under magnification
- Seller who quotes no movement name and no case measurements
Price tiers
- $300 to $450: basic 7750 copy, printed dial details, thin plating
- $450 to $650: applied markers, better dial print, reliable chronograph function
- $650 to $900: decorated movement, correct hand shape and length, sharper case finishing
Above that range you are paying for photography and packaging, not for a better watch. Below it, the chronograph function is usually the first thing to fail.
What to expect after purchase
A 7750-based copy needs servicing attention sooner than a Swiss original, so budget for a clean and lubrication within two or three years of daily wear. Keep the chronograph stopped most of the time, since running the complication drains the reserve. Store the watch off a magnetic surface, and do not swim with it whatever the caseback says. Treated as a mechanical object with a service interval, a good IW371422 copy holds up well; treated as jewelry, it will not.