Quick Answer
The replica IW544765 copies the IWC Portuguese Tourbillon Mystere, a hand-wound precious-metal watch built around a flying tourbillon at 9 o'clock and a long power reserve. A replica of this reference lives or dies on one question: does the tourbillon cage rotate once per minute, or is it a static ring with a balance wheel hidden under it? Case size, dial printing, strap and engraving all matter. The tourbillon is why this reference costs more than a standard copy of a Portuguese chronograph, so check the movement first and the cosmetics second.
Prerequisites
- The genuine layout on hand: tourbillon aperture at 9 o'clock, the cage acts as the small seconds, power-reserve scale on the dial.
- A 10x loupe or a phone macro lens.
- A gram scale and a caliper or a ruler.
- A steady light source and a quiet room.
How to Check a Replica IW544765
- Measure the case diameter across the bezel at the 3 and 9 positions.
- Measure lug-to-lug and case thickness, then compare all three figures to the published specs.
- Turn the watch so the caseback catches the light and watch the tourbillon cage for a full 60 seconds.
- Count the rotations and confirm the cage completes one turn per minute.
- Wind the crown until it stops, then set the watch dial up on a flat surface.
- Check timekeeping at 24, 48 and 72 hours to see how the mainspring holds.
- Weigh the watch head on a gram scale and compare it to the weight expected for the metal claimed.
- Examine the dial printing with the loupe, letter by letter, at the 12 and 6 positions.
- Inspect the caseback engraving for depth, sharp edges and the exact reference string IW544765.
- Tip the crystal toward a lamp and look for a blue or purple reflection from the coating.
- Flex the strap at both lugs and check the stitching and lining.
- Open and close the clasp five times to feel for play in the hinge.
Movement Reality Check
Most replicas at this reference use one of three setups: a Chinese hand-wound tourbillon, an automatic with a decorative aperture, or a quartz movement behind a mock cage. The genuine watch is hand-wound with a seven-day power reserve, so a rotor that spins when you shake the case is a mismatch. Ask for a movement photo before payment. On a tourbillon piece, architecture counts for more than decoration.
Dial and Case Tells
- Printing that looks thick or fuzzy under a loupe.
- A tourbillon bridge that is stamped rather than finished.
- Lug edges that cut into the wrist instead of flowing.
- An aperture that sits off-center from the 9 o'clock marker.
- A power-reserve scale printed at the wrong angle.
Sizing and Wear
The Portuguese case is wide and thin, so a 42 mm copy can wear larger than the number suggests. Check the lug curve against your wrist before you commit, and test the strap at the hole you would actually use. A heavy platinum-style head on a light strap is a common mismatch on replicas of this reference.
Before You Pay
- Request photos of the tourbillon cage in two positions, not one.
- Confirm the movement type in writing.
- Ask for the return window and the shipping method.
- Compare the quoted weight to the metal claimed before you send money.