Answer first
IW545170 is an IWC reference code. The first four digits, 5451, name the model: the Portugieser Hand-Wound. The last two digits, 70, name a case, dial and strap pairing. There is no official synonym for a fake of it. Sellers invent terms to slip past search filters and takedown notices. The synonyms below describe the same counterfeit watch under different labels.
Terms that point to the same watch
- IW545170 replica
- IW5451 super clone
- IW5451 1:1
- 545170 AAA quality
- 545170 mirror quality
- IW 5451 70 (spaced digits, same code)
- Portugieser hand-wound copy
- Portugieser hand-wound homage
Two of those terms are not the same product. A homage is a watch built to look close and sold under the maker's own brand name. A super clone is a counterfeit with copied dial text and caseback marks. Sellers swap the words so one listing appears under several search phrases.
How the reference code works
IWC writes references as IW plus six digits. The first four digits set the model line. The last two digits set the variant. A search for 545170 and a search for 5451 70 return the same model family. A search for 5451 alone returns every variant, including dial colors and case metals that are not the 70 build.
Checks on the watch itself
- Movement. The IW5451 uses a hand-wound IWC calibre. A rotor through the caseback means the watch is a different reference or a copy.
- Subdial. Small seconds sits at 6 o'clock. Running seconds at 9 does not match.
- Case width. Measure with calipers at the 2 and 8 o'clock points. Published specs beat seller text.
- Caseback engraving. Depth and edge sharpness differ on cast copies. Compare against a macro photo of a genuine unit.
- Price. IWC lists the Portugieser Hand-Wound in the thousands of US dollars. An offer near 400 dollars describes a counterfeit, not a discount.
Wording that signals risk
Stock photos with no unit in hand. Waterproof claims with no test data. "Same factory" claims with no address. Payment by gift card, crypto or bank transfer with no refund path. A model code in the title but no code on the caseback photo.
What is not known
I cannot confirm which dial, case metal or strap the 70 suffix denotes without IWC catalog data. Any page that lists the full code and shows no photo of the actual unit is unverified. Ask for dated photos of the exact watch, the caseback, and the movement.