What a good IW371424 replica gets right
The IW371424 is a 41 mm Portugieser Chronograph, and a replica is worth buying only if it copies four things: the slim steel case with long curved lugs, the two-counter dial, the feuille hands, and a working automatic chronograph. The best available versions run a modified ETA/Valjoux 7750 with a functioning 30-minute totalizer at 12 and running seconds at 6. Cheap versions hide a quartz movement behind a printed dial, so the subdials never move. Case thickness is the fastest way to separate the two.
IWC IW371424 Replica Guide: How to Judge Quality Before You Buy
Reference points to match
- Case: stainless steel, roughly 41 mm across and 12.5 mm thick, with a narrow bezel.
- Dial: 30-minute counter at 12, small seconds at 6, applied numerals, leaf-shaped hands.
- Movement: IWC calibre 79350, a Valjoux 7750 base, 28,800 vibrations per hour, about 44 hours of reserve.
- Crystal: sapphire with anti-reflective coating applied on the inside.
- Strap: 20 mm lug width, leather or alligator, signed pin buckle.
- Water resistance: 30 m on the original, which means splashes only.
Replica tiers
- Entry (about $80 to $150): quartz, mineral glass, printed subdials. Passes at arm's length, fails in the hand.
- Mid (about $200 to $350): Asian 7750 automatic, working chronograph, sapphire crystal, clean dial print.
- Upper (about $400 to $700): decorated 7750, sharper case finishing, closer dial tone and hand shape, signed buckle.
Before you start
- High-resolution photos of the genuine reference for side-by-side checks.
- Digital calipers for case measurements.
- A loupe or a phone macro lens.
- Photos of the actual watch from the seller, not catalog images.
How to check an IW371424 replica before you buy
- Measure the case with calipers; it should read close to 41 mm across, crown excluded, and about 12.5 mm thick.
- Study the dial under magnification; applied numerals sit above the surface and cast a slight shadow, while printed markers sit flat.
- Start the chronograph and watch the counter at 12; it should jump once per minute, not sweep.
- Count the beats of the small seconds hand at 6; eight ticks per second points to a 7750-based automatic, one tick per second points to quartz.
- Rock the watch gently side to side; an automatic rotor swings with a soft metallic sound, and silence suggests a battery.
- Press the pushers; travel should be short and firm, and the reset should snap both hands back to zero in one push.
- Angle the crystal under a lamp; sapphire with inner coating shows almost no glare, while mineral glass throws a strong green or blue reflection.
- Inspect the engravings on the caseback and between the lugs; lines should be crisp, even, and centered.
- Check the strap width at the lugs; it should measure 20 mm, and the buckle should carry a proper signature rather than a generic stamp.
Red flags
- Subdials that never move or that sweep instead of stepping.
- Case thickness above about 14 mm, which usually means a quartz case built around a battery.
- Shallow or blurry engraving on the back.
- Listing photos that show two different watches.
- A price far below the tier you are shopping in.
Care and realistic expectations
Treat any replica of a 30 m watch as splash resistant. Keep it out of showers, pools, and dishwater. Wind it by hand only when it has stopped, then let the rotor do the work. A 7750-based movement needs service every few years if you wear it daily, so ask the seller about parts availability before you commit. Store the watch on a soft surface to protect the crystal coating, and wipe the case with a dry microfiber cloth after wear.