Short answer
A fake IW328026 is a counterfeit IWC Pilot's Watch, and the reference number engraved on the caseback is the first thing sellers get right because it is easy to copy. Everything else is where the work shows. Case finishing, dial printing, the date wheel, crown action, and the movement under the glass are where a counterfeit loses the argument. If the asking price is a fifth of what a used example sells for, you already have your answer.
What the reference actually is
IW328026 sits in IWC's Pilot's Watch family, the line that traces back to the Mark series and the military-issue watches of the 1940s. These are tool watches: legible dials, soft-iron inner cases for magnetic protection, screw-down crowns, and a case around 40mm on the modern versions. That matters when you are checking authenticity, because a tool watch has to survive daily wear. Counterfeits are built to look correct in a photograph, not to keep time after two years on a wrist.
Where counterfeits give themselves up
Dial printing
Look at the text under the logo and the numerals at 12. Genuine IWC printing is crisp under a loupe, with even stroke weight and no ink spread. Fakes show fuzzed edges, letterforms that run slightly wide, and a minute track that drifts off centre. On the antimagnetic line, the letters often look stamped into the dial rather than printed on it.
Date wheel and crown
A genuine date wheel sits square in the aperture with a font that matches the rest of the dial. Fakes use a generic wheel, so the numeral shape will not match and the window edges look cut rather than chamfered. On the crown, threading is the giveaway. Wind it. Real ones move smoothly with a firm click at each position. Fakes feel gritty or loose, and the stem wobbles when you pull it out.
Case and bezel finishing
Run a fingernail along the case flank where brushed meets polished. Real IWC finishing is a clean, sharp transition. Counterfeits either blend the two surfaces or leave a burr that catches your nail. Check the lugs as well. On fakes, the lug holes are often drilled slightly off centre, and the spring bars sit at an angle.
Movement and caseback
If the watch has an exhibition back, compare the rotor engraving and movement finish against factory photographs. If the caseback is solid, that is not proof of anything. Plenty of fakes are closed-back precisely so you cannot look. Ask for a clear movement photo and a shot of the engravings around the caseback rim.
Strap, buckle and clasp
Stitching on a genuine strap is even and the leather has a real grain. Fake straps are often corrected-grain with a printed pattern and glue showing at the edge. Buckle engraving on fakes is shallow, and the tang is thinner than it should be.
Price is the fastest filter
Used IWC Pilot's Watches hold value in a fairly narrow band. When a listing sits far below the secondhand market, or the seller says no box, no papers, no returns, cash only, you are looking at a counterfeit or a stolen watch. Neither is a good deal at any price.
What to ask before you buy
- A photo of the movement, not just the dial.
- Service history, with a receipt from a watchmaker or from IWC.
- Box, papers, and the original purchase date.
- Whether the seller will meet at an authorised dealer or a watchmaker for verification.
A seller with a real watch will answer all four questions without hesitating. Someone selling a fake will stall on the first one.