If you are shopping for a replica Tourbograph Perpetual Calendar, here is the short answer: nothing in the replica market reproduces what the original does. The genuine piece is an A. Lange & Söhne platinum watch with a one-minute tourbillon, a split-seconds chronograph, and a full perpetual calendar, all driven by a single hand-wound movement with a fusée-and-chain transmission. What gets sold under that name is a watch with a working tourbillon (often a real Chinese one) and calendar displays that look busy but rarely count leap years. Knowing which parts are honest saves you from paying four figures for a dial.
What the original actually is
The Tourbograph Perpetual "Pour le Mérite" is one of the most complex wristwatches Lange has built. Platinum case, roughly 43mm, limited to fifty pieces, hand-wound calibre with a chain-driven fusée, a tourbillon with a stop-seconds mechanism, a rattrapante chronograph, and a perpetual calendar with moonphase. Retail sits well into six figures, and secondary prices have run higher. That matters because it sets the bar for any replica claim. A true perpetual calendar mechanism, on its own, costs more to make than most replica watches sell for complete.
What replica factories can and cannot build
Real tourbillons do exist at replica prices. Chinese movements from Seagull, Hangzhou, and Liaoning plants put a genuine rotating cage in watches that sell for a few hundred dollars. That part of the equation is solved.
Perpetual calendars are not. A perpetual calendar needs a program wheel or a 48-month cam, a leap-year indicator, and a date train that knows February has 28 days three years out of four. No factory is producing that at replica scale. Split-seconds chronographs are nearly as rare. Rattrapante mechanisms require a second chrono wheel, an isolating lever, and a clamp, and they show up in replica catalogs as a second hand that simply follows the first.
How to spot a fake perpetual calendar
- Set it to February. Advance the date to February 28 and watch what happens next. A real perpetual calendar rolls to March 1. A replica with a standard date wheel will show 29, 30, and 31.
- Check the leap year hand. It should sit on one of four positions and move only once every four years. On replicas it is frequently static or painted on.
- Test the moonphase. A correct moon disc advances once per lunar day on a 59-tooth wheel. A common shortcut is a 24-hour disc that flips once a day.
- Try the correctors. Real perpetual calendars use recessed pushers for day, date, month, and moon. If the pushers are decorative or the displays only jump when you move the crown, the module is cosmetic.
- Look at the subdial hands. Independent setting is a good sign. Hands that always move together are geared off one another.
The chronograph question
Ask the seller for a video showing both chrono hands. Start the chrono, let it run, then press the split pusher. On a real rattrapante the lower hand stops while the upper keeps running, and the split pusher catches it up. On a replica you will usually see one hand, or two hands that never separate. Single-pusher chronographs on these watches are also a warning sign, since the original uses two pushers plus the split function.
Case, weight, and movement finishing
Platinum is dense. A 43mm platinum head weighs well over 100 grams before the strap, and it feels cold and heavy in the hand. Replicas are almost always 316L steel, sometimes with a platinum-tone coating or a tungsten caseback for heft. If the seller claims platinum, ask for a photo on a scale.
Look at the movement through the caseback. A real chain-driven fusée has a visible chain running over a cone-shaped pulley. Replicas use a standard going train and a decorated plate. Hand-engraved balance cocks and black-polished steel parts are things you will not find at replica prices, so a mirror finish on every screw is usually a sign of a plated Chinese movement rather than hand finishing.
Price tiers, honestly
- Under $150: quartz or basic automatic, open-heart instead of a tourbillon, printed calendar apertures.
- $300 to $700: a real working tourbillon from a Chinese maker, simple date, decorative day and month discs.
- $800 to $1,500: better cage finishing, sapphire on both sides, sometimes a functioning month and date module that still is not perpetual.
- Above $2,000: rare, often custom builds or modified movements. Even here, expect no true rattrapante and no chain drive.
If you still want one
Buy it as a design piece, not as a complication. The dial layout, the blued hands, the brushed and polished case flanks, and the tourbillon aperture are the parts you will actually enjoy. Set your expectations on the calendar and you will not be disappointed when March 1 arrives on its own.
One practical note for US buyers: watches carrying a Lange trademark are counterfeits, and customs can seize them. Unbranded homages with similar layouts avoid that problem and often use the same movements.
Bottom line
A replica Tourbograph Perpetual Calendar can give you a genuine tourbillon, a handsome platinum-look case, and a convincing dial. It will not give you a perpetual calendar or a split-seconds chronograph. Verify the date behavior in February, test the chrono hands, and weigh the case before you pay. Those three checks separate a fair deal from an expensive story.