IW371460 is a stainless steel IWC Portugieser Chronograph from the 3714 generation, and a fake is usually exposed in four places: the subdial layout, the movement visible through the display back, the case thickness, and the dial printing. Genuine watches run IWC calibre 79350, a heavily reworked Valjoux 7750 with small seconds at 6 o'clock and a 30 minute totalizer at 12 o'clock. Most replicas use a stock 7750 or a quartz module, so the counters sit in the wrong spots and the case runs 1 to 2 mm too thick.
What are the genuine IW371460 specifications?
The reference belongs to the 3714 family of the Portugieser Chronograph, a line IWC has built in stainless steel, red gold, and platinum. Use these numbers as the baseline for any suspect watch, then confirm the exact reference on IWC's own product data before money changes hands.
- Case: stainless steel, 40.9 mm diameter, roughly 12.3 mm thick, 20 mm lug width
- Movement: IWC calibre 79350, automatic chronograph, 28,800 vph, about 44 hours of power reserve
- Dial: bi compax, small seconds at 6 o'clock, 30 minute counter at 12 o'clock, date aperture at 3 o'clock
- Crystal: convex sapphire with antireflective coating, plus a sapphire display back
- Water resistance: 30 m, with an alligator strap and steel pin buckle on most references
How do you spot a fake IW371460?
Work through the checks in order, starting at the dial, because the chronograph layout is the hardest detail for a counterfeiter to hide. A loupe and a set of calipers settle most arguments in under a minute.
- Subdial layout: running seconds must sit at 6 o'clock. A sweeping seconds hand at 9 o'clock means a stock 7750 inside.
- Case thickness: fakes typically measure 13.5 mm or more against a genuine 12.3 mm.
- Movement finish: look for Cotes de Geneve striping on the rotor, blued screws, and the Probus Scafusia engraving.
- Dial printing: applied faceted numerals, flat sharp text, and no fuzzy edges under magnification.
- Date window: a crisp, sharply cut aperture with correct date font, aligned squarely at 3 o'clock.
- Hands: feuille leaf hands that reach the minute track, not stubby or flat stamped shapes.
- Pushers: a short, firm chronograph throw. Gritty or mushy pushers point to a cheap module.
Can you verify the reference and case number?
The reference and case number are engraved on the case back and between the lugs, and the fonts are deep and even. Replicas usually laser etch shallow text with the wrong letter spacing, and the numbers rarely match any real production run.
Do the box and papers prove anything?
No. Boxes, warranty cards, and manuals are widely copied, so treat paperwork as supporting evidence only and never as proof. Service records from an authorized IWC center carry far more weight.
Why is the movement the strongest tell?
Calibre 79350 is a modular chronograph built on the Valjoux 7750 base, and IWC reworks the rotor, bridges, and finishing to its own standard. Counterfeiters cannot replicate that layout at a profit, so they either leave the subdials in the native 12-6-9 arrangement or fit a quartz movement behind a decorated plate. Once you view the movement through the sapphire back, the case is effectively closed.
How much does a real IW371460 cost?
Pre owned stainless steel Portugieser Chronographs generally trade in the low to mid four figures in US dollars, depending on dial color, age, and completeness. Because the reference has been in production for years, buyers can usually find a genuine example for less than they expect, which removes most of the incentive to gamble on a replica.
Is a fake IW371460 legal to buy or sell in the United States?
Selling counterfeit watches is a federal crime under 18 U.S.C. Section 2320, and US Customs and Border Protection seizes counterfeit goods at the border. Buyers face confiscation of the watch with no refund, plus no manufacturer service, no parts support, and no resale value. A replica is not a discount IWC, it is a liability with a seconds hand.