Short answer
Two references cover most of this market: the Breguet Classique 5327 and the Breguet Classique 7327. Ref. 5327 has a 40 mm gold case. Ref. 7327 launched in 2023 with a 39 mm case and a redrawn dial. Both run a perpetual calendar with day, date, month and leap year. The 7327 is newer and smaller. The 5327 is older and easier to find on the secondary market.
breguet classic perpetual calendar comparison
Case and dial: what changes
- Case size: 40 mm on ref. 5327, 39 mm on ref. 7327. One millimeter changes wrist feel more than the number suggests.
- Dial: ref. 5327 uses a silvered gold dial with engine-turned guilloché, blued steel Breguet hands and a date subdial. Ref. 7327 keeps the guilloché base and moves the calendar apertures. Compare photos at full zoom before you judge the layout.
- Metals: ref. 5327 is listed in rose, yellow and white gold. Ref. 7327 is listed in rose and white gold. Confirm the metal code on the caseback, not on the listing.
What does not change
- Functions: day, date, month and leap year. Set once, then no correction until 2100, because 2100 is not a leap year.
- Crystal: sapphire front and back on both.
- Water resistance: 30 m on both. That is splash resistance, not swimming.
- Strap: alligator leather with a gold pin buckle or folding clasp.
Movement notes
Breguet lists caliber 502.3 DRP1 in ref. 5327 and a 502.3 variant in ref. 7327. Both are automatic. Power reserve sits in the 40 to 50 hour band. Ask for the current spec sheet for the exact caliber code and reserve figure, because Breguet has revised these calibers and dealer sheets differ by production year. Thickness numbers on resale listings are frequently copied from the wrong reference, so measure the case yourself.
Breguet Classique Perpetual Calendar Replica Features
Replica market: what to check
Perpetual calendar replicas sit at the hard end of the fake market. The module carries more parts than a date wheel, tooling cost is high, and output is small next to Submariner or Daytona clones. Test these points:
- Leap year: set the watch to February 28 of a leap year and advance it. The date must move to February 29, then to March 1. A decorative leap year hand will not move.
- Date jump: a real instant jump happens near midnight. Slow creep across two hours points to a base movement with a bolt-on module.
- Case size: measure with a caliper. Replica 5327 cases have turned up at 41 mm.
- Guilloché: on replicas the pattern is stamped, not cut. Under a loupe the lines look shallow and repeat with visible spacing.
- Hands: Breguet hands are thin, with a hollow eccentric tip. Cast replica hands look thick at the tip.
Price and service
A gold Breguet perpetual calendar runs well into five figures USD at retail. Secondary quotes move with metal, box, papers and service history. Service on a perpetual calendar module costs more than service on a time and date watch: four figures USD at an independent watchmaker, more at the brand. A 5327 with no service record carries that cost as a risk. Budget for it before you bid.
fake breguet classic perpetual calendar
Bottom line
Pick the 7327 for the smaller case and current production. Pick the 5327 for availability and a lower secondary price. On a replica, test the calendar function first and the finish second, and have a watchmaker open the back before you trust the module.