A fake master calendar is a replica watch that copies a full calendar model, showing the day, date, and month (often plus a moonphase) on the dial. Good copies run real calendar wheels, springs, and corrector pins. Cheap copies print extra subdials onto a basic movement, so only the date window moves.
What Does "Master Calendar" Mean on a Watch?
The name comes from model families such as the Jaeger-LeCoultre Master Calendar, a triple calendar with a moonphase. In watchmaking, a "full" or "master" calendar simply means the dial shows more than one date element.
- Triple calendar: day, date, and month, with a moonphase on most versions.
- Annual calendar: tracks day, date, and month and needs one correction a year, after February.
- Perpetual calendar: knows leap years and stays correct for decades on most mechanical designs.
A replica can copy the look of all three. Whether the gears behind the dial match that look is a separate question, and it is the one that decides the price.
Which Calendar Functions Work on a Fake Master Calendar?
Function level tracks price. Before paying, ask which subdials move and how each one sets.
- Low tier ($80 to $150): the date window works, day and month subdials are printed or fixed, and the moonphase disc never turns.
- Mid tier ($250 to $500): day, date, and month all advance. The moonphase window often runs a 24-hour day/night disc instead of a lunar cycle.
- Top tier ($600 and up): day, date, month, and a moonphase disc that tracks the 29.5-day lunar month. The corrector pins on the case band work.
Most top-tier copies ignore leap years. A replica perpetual calendar is a triple calendar with a fancier dial, and it stops after February like any other full calendar.
How Do Makers Build a Working Calendar Movement?
Most replica full calendars use the Asian 7751, a chronograph base with a calendar module stacked on top. The module carries the day, month, and moonphase wheels while the base movement drives the date disc.
That base explains a few things buyers notice on the wrist. The watch sits thicker than the original, the corrector pushers live on the case band, and the rotor has a wobble you can feel through the caseback.
A few factories copy an in-house style calendar caliber and build a matching module from scratch. Those watches cost more and are harder to repair, because an independent watchmaker may not stock the parts.
How Close Is the Dial Layout to the Original?
Genuine master calendars place the day and month in windows at 12, run the date on a hand around the dial, and drop the moonphase to 6. Most replicas built on a 7751 base move those elements into subdials at 12, 6, and 9.
Some factories rework the module to push the moonphase back to 6 o'clock and use a center date hand. Compare side-by-side photos of the copy and the original if layout matters to you.
How to Tell If the Calendar Is Fake on the Dial
- Press each corrector with a toothpick and watch the matching subdial. If nothing jumps, the subdial is decoration.
- Set the watch to 11:58 PM and watch midnight. A real calendar snaps the date in one step. A fake drags it across over an hour.
- Check the moonphase window. If the disc shows a sun and moon that never move, it is a print behind glass.
- Study the day and month lettering. Printed discs use flat, thin fonts, while stamped wheels sit deeper and catch light.
- Compare case thickness to the genuine spec sheet. A calendar module adds height, so a copy that matches the original height on paper may hide a dead dial.
What Should You Check Before Buying?
- Ask for a video of the functions running, not still photos.
- Confirm the movement name and jewel count in the listing text.
- Verify that every corrector pin is present and presses with a click.
- Ask about the setting window. Never set a mechanical calendar between 9 PM and 3 AM.
- Treat water resistance claims as modest. Calendar cases and pushers do not belong in a pool.
Common Problems With Replica Calendar Watches
A calendar module adds gears, jumpers, and springs that a three-hand watch does not have. Every extra part is a failure point.
- Correctors jam when pressed at the wrong time or with too much force.
- Moonphase discs drift and need resetting every few weeks.
- Modules wear out faster than base movements, and a repair bill can pass the price of the watch.
- Parts for a copied module are tough to source, so a broken calendar may stay broken.
Price Guide for Replica Full Calendar Watches
Prices move with movement quality, dial finish, and factory reputation. Treat these bands as rough markers, not fixed rules.
- Under $150: quartz or basic automatic, printed calendar, no working moonphase.
- $250 to $500: Asian 7751 with working day, date, and month. Moonphase may be a 24-hour disc.
- $600 to $900: better module, sharp dial printing, corrector pins that work, sapphire crystal.
- Over $1,000: cloned in-house style caliber, closest case dimensions, hardest to service.
Frequently Asked Questions
Does the moonphase on a fake master calendar work?
On top-tier copies, yes. The disc turns on a 29.5-day cycle and sets with a corrector pin. On cheaper models the window holds a fixed printed disc or a 24-hour day/night wheel.
Can a replica perpetual calendar track leap years?
No, in most cases. True perpetual logic needs a program wheel with pins or levers. Replicas use a triple calendar module that needs a manual correction after February.
Is a fake master calendar worth buying?
It depends on what you want. If you like the look and the day, date, and month move, a mid-tier copy delivers that. If you want a calendar that runs without correction, no replica at any price does that.