Replica IW545110: answer first
Public IWC reference lists do not show IW545110. Numbers in the 545x block sit in the Portuguese Hand-Wound family: hand-wound caliber, small seconds at 6 o'clock, steel case near 44 mm. A listing that says "replica iw545110" sells a copy of that shape. It is not a copy of a documented reference. No factory outside IWC holds drawings for it.
That gap matters. When a reference number cannot be checked against a maker's archive, a buyer cannot compare case, dial, or engraving to an original. Verification drops to the seller's photos and the seller's word.
What the number points to
IWC built the Portuguese line for two importers in Portugal in 1939. The line returned in the 1990s and 2000s with large cases and pocket-watch derived movements. Hand-wound versions carry caliber numbers in the 98xxx family, which IWC lists alongside case size and power reserve. A 44 mm case, a domed sapphire crystal, and a subdial at 6 o'clock are the parts a replica maker has to copy.
Specs to compare against the original
- Case: diameter, lug width, thickness, finish on the bezel.
- Crystal: sapphire, with anti-reflective coating on both faces.
- Dial: applied or printed numerals, spacing of the subdial, font of the IWC and Schaffhausen lines.
- Hands: leaf shape, length against the subdial track.
- Movement: hand-wound in the original. A rotor behind a display back contradicts a hand-wound claim.
- Caseback: reference number, case number, depth of engraving.
- Strap and buckle: grain pattern, pin buckle, hallmark.
Movement claims in replica listings
Sellers label movements as Swiss, Japanese, or clone 2824. A stock ETA 2824 and a Seagull ST21 both beat 28,800 times per hour. Neither matches a hand-wound IWC caliber. Ask for the maker name, the beat rate, and a photo of the movement.
Inspection steps
- Time the watch for 24 hours against a phone clock. Note drift in seconds.
- Check the subdial at 6 for alignment with the center line.
- Weigh the case. Steel copies land close to the original. Plated brass does not.
- Test water resistance at a watchmaker, not at a sink.
- Ask for the case number in photos and compare it to the number on the card.
Legal status in the US
Counterfeit watches are illegal to import and to sell in the United States. 18 U.S.C. 2320 sets criminal penalties for trafficking in counterfeit goods. 15 U.S.C. 1124 bars import of goods carrying an infringing mark. CBP can seize and destroy shipments. A personal-use purchase carries seizure risk at the border and no recourse against the seller.
Price and value
Copies of this style sell between 100 and 400 US dollars in online listings. Originals trade in the thousands on the secondary market. A copy has no resale channel, no service network, and no parts support. Ask the seller for movement maker, case material, and return window in writing.
What stays unknown
No public IWC document ties IW545110 to a caliber, a case size, or a production year. Treat any listing that states those details as a claim, not a fact.