The short answer
A purchase guide for a counterfeit Rendez-Vous Moonphase is not something worth writing, because selling counterfeits is a federal crime in the United States and a trademark violation nearly everywhere else. The Rendez-Vous name belongs to Jaquet Droz, and unauthorized copies of that design are not a budget shortcut, they are seized merchandise and a legal risk for anyone who trades in them. If what you actually want is a moonphase on your wrist, the honest route costs less than most people assume. Real moonphase watches with a true 29.5 day lunar cycle start in the low hundreds of dollars and run upward from there, and every one of them can be serviced, worn daily, and resold.
What a moonphase complication actually does
A moonphase is a disc with two moons printed on it that advances one tooth per day and completes a full cycle in 29.5 days, tracking the synodic month. A proper mechanism drifts only about one day every two to three years and is corrected with a pusher or the crown. Many cheap watches labeled moonphase show a rotating sun and moon that flips every 12 hours, which is a day and night indicator, not a lunar calendar. That distinction is the single most useful thing to check before you spend money.
What to look for in a genuine moonphase watch
- An aperture at 6 o'clock with two moons and a star field, not a disc that swaps a sun for a moon twice a day.
- A movement you can name. ETA, Sellita, Miyota, Seiko, and in house calibers are all serviceable by an independent watchmaker.
- Case finishing that survives daily wear, meaning brushed flanks with polished bevels rather than uniform shine.
- A corrector tool or recessed pusher so you can set the phase without scratching the case.
- Documentation and a serial number that match the case, which is what makes resale possible.
Parameter bands worth knowing
Case size between 36 mm and 40 mm suits most wrists for a dress moonphase, and anything under 10 mm thick slips under a cuff. Sapphire crystal on both sides holds up far better than mineral glass. Water resistance of 50 m covers hand washing and rain, while 100 m is the point where you stop worrying. On accuracy, a well regulated automatic in the plus or minus ten seconds per day range is normal, and a quartz moonphase can hold the phase for years on one battery.
Pitfalls to avoid
- Sellers who show stock photos instead of the actual watch, which usually means there is no watch.
- Listings that use a brand name in the title but describe the item as inspired by or in the style of.
- Prices far below any plausible market level for the movement described.
- No return window and payment methods with no buyer protection.
- Phases that cannot be set independently, a sign the aperture is decorative.
FAQ
Is buying a counterfeit watch illegal?
Purchasing for personal use is rarely prosecuted, but importing counterfeit goods can lead to seizure by customs, and selling or trafficking them is a criminal offense.
How much should a real moonphase cost?
Entry level mechanical moonphases from established makers sit in the mid hundreds to low thousands, and quartz versions cost less. Anything advertised as a luxury moonphase for a fraction of that is a copy.
Where should I shop instead?
Authorized dealers, brand boutiques, and reputable pre owned marketplaces with authentication services. A used genuine watch from a known reference is a better long term purchase than a new counterfeit.