Buy the seller before you buy the watch
With a Villeret moon phase, the dealer decides the outcome more than the listing copy does. Before any payment, ask for three things: dated in hand photos of the exact unit, a short video where the moon disc moves, and a timegrapher photo showing rate, amplitude, and beat error. A dealer who answers those requests within a day is a dealer worth continuing with. One who replies with factory renderings, dodges the movement question, or pushes an irreversible payment method is showing you how the after sales conversation will go. Everything below matters, but none of it matters as much as that first test.
What a solid Villeret moon phase dealer does differently
- Shoots the actual watch, not a catalog file, including a macro of the moon aperture and the caseback engraving.
- Confirms the calendar layout in writing: day and month apertures below 12, moon aperture at 6, and the date read by a blued serpentine hand that sweeps to a printed track of 1 to 31 around the rim.
- Shows the recessed correctors under the lugs and includes the setting tool in the box.
- Names the movement family in the listing instead of writing "high grade automatic" and leaving it there.
- Publishes a return window in days, states who pays return shipping, and honors it without a restocking argument.
- Packs with the crown pulled to the setting position and the calendar already on the correct day.
A dealer who describes the reference accurately is telling you they handle the watch. A dealer who lists it as a generic "moon phase classic" is telling you they handle boxes.
villeret moon phase authorized dealer
Parameter bands worth checking
- Case diameter: 40 mm nominal. Accept 39.7 to 40.3 mm measured across the bezel with the crown excluded.
- Thickness: 10.5 to 11.3 mm. A case that sits near 12 mm usually means a thicker base movement and a dial that sits high in the aperture.
- Lug width: 22 mm on this case shape. Ask for a caliper photo with the strap off if you plan to fit your own strap.
- Moon disc: two moons on a deep blue field with stars, crisp crater edges at macro distance, no ink bleed into the aperture.
- Date hand: the tip should land inside the printed numerals, not float between them or overshoot the track.
- Correctors: recessed into the caseband under the lugs. Side mounted pushers are the wrong case entirely.
- Caseback: sapphire crystal with even engraving depth and legible reference text.
- Water resistance: 30 m on the original. Treat any deeper claim as marketing and keep the watch out of water.
Pitfalls that cost money
- The moon that only moves when pushed. The disc should advance with the running movement across a 29.5 day lunation, not just respond to the corrector. Ask for a two part video: one push, and one running shot.
- Stock photos with a real watch delivered. If the listing image appears on five other sites, you are buying a promise, not a piece.
- Setting the calendar at the wrong hour. Never change day, date, or moon between roughly 9 pm and 3 am. The gear train is engaged and the calendar can jam. Ask the dealer for their setting sequence in writing.
- No timegrapher data. A moon phase module adds drag, so amplitude under 250 degrees at full wind is a warning sign, not a personality quirk.
- Payment with no dispute window. Irreversible transfers remove your only leverage. Use a method that lets you open a claim.
- Strap as an afterthought. Cheap leather with painted edges will crack within weeks and makes a good case look like a market stall find.
- Vague warranty language. "Full warranty" without a duration, a coverage list, and a named contact is decoration.
FAQ
Should the correctors sit under the lugs?
Yes on this reference. Push pins hidden under the lugs are the correct architecture for the Villeret complete calendar. Visible pushers on the caseband mean the case was borrowed from another model.
How do I confirm the moon phase works before it ships?
Request a video with the watch running and a close up of the aperture as the corrector is pressed once, followed by a separate clip showing the disc has advanced from the movement alone. A dealer who cannot produce both is guessing.
What should I ask about the movement?
Ask for the caliber family, the beat rate, and the stated power reserve. Then compare the answer against the timegrapher photo. Numbers that disagree with each other are a bigger warning than a low number.
Is a thinner case always better?
Within the band, yes. A case that matches the original profile keeps the dial proportions correct, and the moon aperture sits at the right depth instead of looking like a porthole.