A replica Rendez-Vous with a 'back of the moon' detail is a fake Jaeger-LeCoultre Rendez-Vous Moon, a ladies' watch built around a moonphase disc and a decorated case back. The phrase covers two things buyers check: the hidden half of the lunar disc, which stays out of the aperture for about two weeks each cycle, and the underside of the watch. Both are places where cheap replicas fail and good ones hold up.
What Does 'Back of the Moon' Mean on a Rendez-Vous Replica?
A moonphase aperture is a window. It shows one slice of a rotating disc that carries two moons, so while one moon sits in view the other hides behind the dial. On a real moon disc both moons get the same treatment, because the maker knows the wearer will see each one for half the month.
Replica factories work to a different logic. Many print only the moon that shows first and leave the second as a pale circle. A quick test: set the moonphase forward two weeks with the pusher or crown and look at what appears.
- Moon face detail: look for craters, shading, and a warm cream tone, not a flat white blob.
- Disc surface: sapphire or polished metal discs look deep. Paper and matte plastic look dusty under light.
- Star field: the background should be dark navy or black with fine stars. Bright silver dots read as cheap.
- Alignment: the moon should sit inside the aperture with even gaps, not clip the edges.
The Case Back: Where Quality Shows
Flip the watch over before you look at the dial again. The back carries three tells: the engraving, the window material, and the movement you can see through it.
Engraving Quality
Genuine JLC case backs carry crisp text with sharp shoulders and even depth. Laser etching on replicas often looks shallow and grey, and the letters blur under a loupe. Run a fingernail across the text. You should feel an edge, not a smooth patch.
Sapphire Window vs Mineral Glass
Higher-tier replicas use sapphire for the display back, the same as the genuine. Cheaper builds use mineral glass, which scratches and picks up a haze after a few months of wear. If the seller cannot confirm sapphire on both sides, assume mineral.
What You See Through It
A moonphase movement needs a module or an integrated calendar train, and that costs money to copy. Look for a decorated rotor, blued screws, and Geneva stripes. A bare, unmarked plate with a plastic spacer ring means the factory skipped the finish work.
Movement Choices and What They Cost You
- Quartz moonphase: the cheapest option. The disc jumps once a day and the second hand ticks. Fine for occasional wear, weak for anyone who handles watches.
- Automatic with a moon module: a base automatic movement with a moonphase plate bolted on. The moon tracks the real cycle within a day or so per month.
- Automatic with an integrated moonphase: closest to the genuine layout. Price jumps, but the case stays slim and the pusher feel is right.
Ask which movement is inside before you pay. A seller who cannot name it is guessing, and so are you.
Case Size, Materials, and Gem-Set Versions
Most Rendez-Vous Moon references sit between 36mm and 39mm, with a slim profile that slides under a cuff. Replica makers copy the case shape well. They copy the finish less well.
Steel versions are the safest buy. Rose gold plating wears through at the lugs and crown within a year on most fakes, and the color shifts toward copper. Gem-set bezels are the hardest to fake: real diamonds catch light from every angle, while cubic zirconia goes flat in shade.
What a Replica Rendez-Vous Moon Should Cost
- $80 to $150: quartz, mineral glass, printed moon disc. Expect plating wear and a stiff crown.
- $200 to $450: automatic movement, sapphire crystal, a moon disc with two finished faces. This is the sweet spot for daily wear.
- $500 and up: top-tier builds with clone-grade finishing, real sapphire on both sides, and a moonphase that tracks the cycle for years.
Anything above $700 deserves a close look at the movement photos. Above that price, you are paying for a name the watch does not have.
Red Flags Before You Buy
- Photos that never show the case back or the moonphase set at a different date.
- A moon that sits in the same spot in every listing image.
- Water resistance claims over 50m on a watch with a display back and no gasket photos.
- Weight that feels hollow. A good replica in steel lands around 90 to 120 grams on a bracelet.
- A pusher that grinds or a crown that wobbles when you set the moon.
Frequently Asked Questions
Does the moonphase on a replica actually work?
On automatic replicas, yes. The disc advances with the calendar train and stays close to the real lunar cycle. On quartz replicas, the moon often jumps once a day and needs a reset every few months.
Is a replica Rendez-Vous Moon water resistant?
Treat it as splash proof only. Display backs and thin gaskets let moisture in, and most fakes carry no real rating. Take it off before swimming, showering, or washing dishes.
Can a jeweler tell it is a replica?
A trained eye spots a fake in seconds with a loupe, from the movement finish and the engraving. From across a room, a good replica reads as a Rendez-Vous Moon to almost everyone.
Should I pick a solid back or a display back?
Pick the display back if you want the moonphase story to hold up. A solid engraved back hides the movement, which is a fair choice when the movement is the weak part of the build.
Quick Buying Checklist
- Ask for photos of the case back, the moonphase at two different dates, and the crown side.
- Confirm sapphire on the front and back, and ask for the movement name.
- Set the moon to the current date in front of the seller, or request a video of it.
- Check the engraving with a loupe or a phone macro lens.
- Weigh it if you can. Light fakes feel like aluminum.
- Pay with a method that offers a refund window.
A replica Rendez-Vous Moon with a working disc and a clean case back holds up on the wrist. One with a printed circle and a hollow case does not.