Fake Breguet white gold: the short answer
A fake Breguet sold as white gold is almost always a base-metal case with rhodium plating, not an 18k alloy. Genuine Breguet white gold cases carry three things at once: a 750 fineness hallmark, a weight that matches the published specification, and a movement that matches the reference number. Copies usually get one of those right and fail the other two.
What you need
- 10x jeweler's loupe
- Digital scale accurate to 0.1 g
- Small rare-earth magnet
- Digital calipers
- Spec sheet or photos for the reference you are checking
- Access to XRF testing, which most jewelers and pawn shops have on site
How to check a white gold Breguet step by step
- Turn the watch over and read the caseback. Look for the fineness stamp 750 or 18k, a Swiss assay mark, and the Breguet name struck into the metal rather than printed on it.
- Weigh the watch head with the strap removed. Compare the figure against the published weight for that reference. White gold runs heavier than steel at the same case size.
- Hold a magnet near the case. Gold and rhodium are not magnetic. A strong pull means a steel core under the plating.
- Measure the case diameter, thickness, and lug width with calipers. Replicas often sit 0.5 mm to 1 mm off spec.
- Inspect the dial under the loupe. Breguet guilloche is cut on a rose engine, so the lines stay even and continuous. Stamped copies show flat spots and broken ridges.
- Check for wear at the crown, lugs, and caseback edge. Rhodium does not flake off solid gold because there is nothing to flake.
- View the movement through the caseback. Confirm Geneva stripes, blued screws, and the correct caliber number for the reference.
- Cross-check the serial and reference numbers with Breguet or a Swatch Group service center before you pay.
Red flags that show up again and again
- A white gold Breguet priced below the scrap value of 18k gold at that weight
- Hallmarks that look stamped over or sit on a polished surface with soft edges
- Serial numbers that repeat across listings
- A seller who will not allow XRF testing or a jeweler's inspection
- Dial text with wrong spacing, or a font that changes between the dial and the caseback
Why white gold is the hardest case metal to fake
Yellow gold and rose gold identify themselves by color. White gold is alloyed with palladium or nickel, then rhodium plated, so a clean steel case can look close in a photo. The difference shows in density, in hallmark depth, and in what happens after years of wear. Solid 18k white gold can be repolished many times. Plated steel cannot.
If you are buying a replica Breguet
Ask the seller what the case is actually made of. Most replica Breguet watches use 316L stainless steel with rhodium plating. That is fine for a look-alike, but it will not weigh like white gold and the plating wears at contact points. Anyone advertising an 18k white gold replica Breguet at a replica price is describing plating, not alloy.