The "fake Audemars Piguet perpetual calendar 3399" is a seller-side build code for a replica Royal Oak Perpetual Calendar, not an official Audemars Piguet reference number. Buyers searching this term are usually hunting a specific factory version with the day, date, month, moonphase and leap-year layout spaced correctly on the dial. Understanding what the code stands for, and what a perpetual calendar replica can realistically do, makes the decision much simpler.
What the 3399 code actually means
Audemars Piguet publishes its own reference numbers, and those numbers correspond to a defined model, case metal and dial. The 3399 tag that shows up in wholesale listings works differently. It is an internal dealer or factory label used to separate one build from another, so two sellers can apply the same number to watches that differ in case size, dial color or movement. Treat it as a starting point for a conversation, not a specification.
Before ordering, ask the seller to confirm four things: case diameter, dial pattern and color, bracelet style, and the movement family inside. Those details determine how close the watch sits to the genuine article.
How a perpetual calendar differs from a simple calendar
A perpetual calendar tracks the date, day, month, moonphase and leap year, and it corrects itself for short months without input from the wearer. Inside, a program wheel and a set of levers skip the 31st on 30-day months and add February 29 in leap years. Audemars Piguet builds this complication into its Royal Oak line, and the genuine pieces sit far outside the budget of most collectors.
Reproduction versions cannot match that engineering at the same level. They rely on a calendar module stacked onto a base automatic movement, which is worth knowing before you compare any two listings.
What to inspect on a replica Royal Oak Perpetual Calendar
- Subdial placement. The day, date, month and moonphase apertures should sit in the same positions and proportions as the original, with even spacing around the tapisserie dial.
- Dial texture. The waffle or tapisserie grid should be crisp and consistent, not soft or washed out under direct light.
- Case and bracelet finishing. Look for alternating brushed and polished surfaces, sharp bevels, and end links that sit flush against the case.
- Date and month fonts. Thin, mismatched or misaligned printing is one of the easiest tells.
- Case thickness. A calendar module adds height, so a watch that looks noticeably slab-sided next to photos of the original is worth questioning.
Working calendar or decorative dial?
This is the single most important question for this model. On better builds the subdials and moonphase disc actually move. On cheaper ones, some hands are fixed, glued in place, or driven by a plain date wheel that never advances the month. Ask for a short video that shows the date changing from the 30th to the 1st and the month indicator moving. A seller who cannot provide that clip is a seller worth skipping.
Price tiers and warning signs
Replica perpetual calendars fall into rough tiers based on movement type and finishing time. Entry listings often hide a quartz movement or a decorative calendar under a convincing dial. Mid-tier builds usually run a modified automatic with partial function. The top tier offers a fuller working calendar, closer case proportions and better bracelet finishing.
Red flags include stock photos instead of real images, no movement photo, vague answers about the calendar function, and pressure to pay outside a trackable method.
Practical notes for buyers in the United States
Counterfeit watches are trademark-infringing goods. U.S. Customs and Border Protection can seize shipments of counterfeit items, and buying or reselling them carries legal risk. Buyers should weigh that against the appeal of the design itself, and should not expect warranty service or parts support from the brand.
If you simply enjoy the look of the perpetual calendar layout, a replica can deliver the visual experience. If you want the complication to work exactly as intended across decades, only the genuine article will do that.