The "back of the moon" on a replica Rendez-Vous refers to the moon-phase disc and the finished case back of the Jaeger-LeCoultre Rendez-Vous Moon style, not to a separate model. On the genuine design the moon phase sits at the lower dial and the case back is a sapphire window, so a replica has to get two things right at once: the moon itself and what you see when you turn the watch over. Those two areas are also where the gaps between price tiers show up fastest.
Where the Name Comes From
Rendez-Vous is the French term for an appointment, and the line was built around a feminine case shape with rounded lugs and a slim profile. The Moon version adds a moon-phase aperture or sub-dial, and the phrase "back of the moon" entered buyer vocabulary because the moon disc has a rear side that only appears once the disc rotates. In practice, sellers use the term to describe the case back, the moon disc, or both. When you shop, ask which one the listing means, because the answers point to different parts of the watch.
The Moon Phase Disc
A moon phase is a rotating disc with two moons painted or printed on it, cycling over roughly 29 and a half days. On good replicas the disc is a thin metal plate with a printed sky, and the cutout in the dial frames one moon at a time. Points to check:
- Whether the lunar surface has visible craters, or a flat silver blob.
- Whether the stars on the disc are printed or stamped, since printing fades and stamping does not.
- Whether the disc advances each day rather than jumping at odd hours.
- Whether the dial cutout edges are clean, without burrs or paint spill.
Case Back and Engraving
Most Rendez-Vous Moon replicas use a display back, which means the movement is part of the design. Look for a sapphire or mineral crystal, a case back ring that sits flush with the case, and engraving that is cut rather than laser-etched onto the surface. Reference numbers, gold hallmarks, and brand text should be crisp under a loupe. If the engraving looks shallow or uneven, the case is likely a lower grade than the dial suggests.
Movement Choices
Replica moon phases generally run on one of three setups: a quartz module with a decorative disc, an automatic movement with a bolt-on moon-phase module, or a clone of a Swiss automatic with the complication built into the caliber. A quartz moon disc is the least expensive and drifts out of sync over time. An automatic with a module is the common middle ground. Ask the seller which one is inside, and ask how the moon phase is set, because a poorly documented setting procedure is a common source of frustration.
Size, Strap, and Daily Wear
Rendez-Vous cases usually land between 34 mm and 37 mm, which suits most wrists without overhang. Strap quality matters more than buyers expect: alligator-grain leather, a proper deployant clasp, and a 16 to 18 mm lug width should be stated in the listing. If the seller cannot confirm lug width, assume the strap will need replacing.
Legal and Practical Points
Replica watches are imitations of protected designs, and importing, selling, or distributing them can breach trademark law in many countries. Customs authorities in the United States and the European Union seize counterfeit shipments, and buyers can lose both the item and the money paid. Treat any purchase as a risk decision, keep records, and understand that resale value does not exist for replica pieces.
Pre-Purchase Checklist
- Confirm whether "back of the moon" refers to the moon disc, the case back, or both.
- Request close-up photos of the dial cutout and the case back engraving.
- Ask which movement powers the moon phase and how it is set.
- Verify case diameter, lug width, and strap material.
- Check the seller's return policy in writing before paying.
The short version: the moon disc and the case back decide whether a replica Rendez-Vous looks convincing in the hand, so examine both before you compare prices.