Short answer
A fake Jaeger-LeCoultre 1568420 fails on four points: case proportions and lug finishing, dial printing and applied indexes, the in-house calibre visible through the sapphire back, and documentation the brand cannot confirm. Reference 1568420 sits in the Master Control family, so any example with a generic decorated movement, low-grade glass, or shallow laser engraving on the caseback is counterfeit. Verify the serial through a JLC boutique or an authorized service center before you pay.
Before you start
- 10x loupe or a macro lens
- Digital caliper for case diameter and thickness
- Clear photos of the dial, case flanks, lugs, and caseback
- The seller's reference and serial numbers, in writing
- A jeweler's scale if you plan to weigh the watch against a known genuine example
How to tell a fake from a genuine 1568420
- Confirm the reference and model match. Ask the seller for the full reference and the model name. A 1568420 is a steel Master Control piece. If the seller names a different model or quotes a reference from another line, stop there. Mixed references are the fastest way to expose a fake listing.
- Measure the case. Run the caliper across the case at 3 and 9 o'clock, then measure thickness from caseback to crystal. Fake cases run large or thick because generic cases get reused across models. Lug width should match the strap or bracelet the seller fits.
- Inspect the dial with the loupe. Genuine JLC dials use applied, faceted indexes with crisp edges and even lume fill. Fakes use printed or stamped markers, uneven polishing, and hands with flat, unfinished sides. Check the date aperture: a genuine window is cut clean and beveled, a fake one is stamped and rough.
- Study the case finishing. Look at the transition between brushed and polished surfaces on the lugs and bezel. Genuine Master Control cases show sharp, straight lines where the finishes meet. A fake shows rounded, washed out edges and polishing compound left in the corners.
- Check the crystal and its coating. Genuine sapphire is colorless at the edge and carries an anti-reflective coating that cuts glare without a blue or purple haze. A cheap fake uses mineral glass that scratches and shows a strong color cast.
- Look at the movement through the display back. Note the finish, the engraving, and the rotor. Genuine JLC calibres carry deep, sharp engraving on the bridges and consistent Geneva stripes or cotes. A fake uses a stock automatic movement with laser etching, mirrored screws, and a rotor that spins loosely.
- Read the caseback engraving under magnification. Genuine stamps are crisp, evenly spaced, and cut into the metal. Laser-etched fakes look shallow, gray, or dotted under a loupe, and the fonts often differ from the brand's.
- Verify the serial and reference with the brand. A boutique or authorized service center can confirm the combination. Ask for the service history and any box and papers. A watch that cannot be confirmed is a fake until proven otherwise.
- Weigh the price against the market. Genuine steel Master Control references trade in the thousands of dollars. A new-in-box offer at a fraction of that price is a counterfeit, a stolen watch, or a scam.
Details counterfeiters usually get wrong
- Movement finish and the depth of rotor engraving
- Applied versus printed hour indexes
- Caseback font, spacing, and engraving depth
- Lug curve and how the strap sits against the case
- Box, papers, and warranty card print quality
When to walk away
Walk away if the seller refuses an in-person inspection at a jeweler, blocks a serial check, ships from a location unrelated to the listing, or accepts payment only through untraceable methods. Ask for a short video of the watch running with the second hand sweeping and the crown operated. Fakes often hide a jumpy seconds hand, a stiff crown, or a date change that snaps late. A genuine 1568420 comes with a movement built and finished in-house, and no replica matches that level of detail under a loupe.