Short answer
The IW371460 is a reference in the IWC Portuguese Chronograph family, the 3714 line. A fake IW371460 is a copy of that watch. Genuine specs: 40.9 mm steel case, 12.3 mm thick, sapphire crystal front and back, automatic calibre 79350, with a 30-minute chronograph counter at 12 and running seconds at 6. Copies sell for $100 to $400. Steel 3714 examples on the secondary market carry asking prices from $4,000 to $7,000. The gaps show in the dial layout, the movement finish, and the caseback text.
IWC uses the last two digits of a reference number for dial and metal variants. Public listings for IW371460 are sparse. Confirm the dial color and case metal against an official source before you treat one spec as fixed.
Dial layout
- Two subdials only. Small seconds at 6 o'clock, 30-minute counter at 12 o'clock.
- No date window. A copy with a date at 3 o'clock sits on the wrong base movement.
- No third counter. A 12-hour totalizer marks a stock 7750 chronograph.
- Applied gold numerals on steel models, leaf hands, printed minute track.
Copy dials show heavy printing, soft numeral edges, and subdials at the wrong distance from the center. Photograph the dial at an angle and watch the reflection off the crystal. Genuine sapphire has anti-reflective coating on both faces.
Movement
Calibre 79350 is automatic. It is an IWC-modified Valjoux 7750 with the 12-hour counter removed. Look through the sapphire caseback. A genuine example shows Geneva stripes, blued screws, an IWC-signed rotor, and 28,800 vibrations per hour. Most copies use a Seagull ST19 or an unfinished 7750 clone. A hand-wound movement is wrong for this reference.
Case, crown, pushers
The case is 40.9 mm wide and 12.3 mm thick, with a polished bezel and brushed flanks. The crown carries the IWC fish logo. Pushers are round and sit level with the case band. Copies run 0.3 mm to 1 mm thicker, and the pushers feel loose. Water resistance is 30 m on the genuine watch. Replicas do not hold a seal.
Caseback, papers, price
Engraving reads International Watch Co., Schaffhausen, Portuguese Chronograph, the reference, and a serial number. Font weight is even. Copies show shallow laser etching and serial numbers that repeat across batches. A box proves little. Service papers from IWC prove more.
Price is the fastest tell. A new copy costs under $400. A steel 3714 sells for thousands. A "genuine" watch far below market points to a copy.
Legality in the United States
Selling a watch with an IWC logo that IWC did not make is counterfeiting. Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. Trademark owners can sue under the Lanham Act. U.S. Customs and Border Protection seizes counterfeit shipments at the border. The buyer loses the money and the watch.