A fake Vacheron Constantin Traditionnelle Chronograph fails fastest at the movement. Genuine watches run the in-house caliber 1142, a hand-wound column-wheel chronograph derived from the Lemania 2310 and stamped with the Poinçon de Genève. Counterfeits almost always hide an ETA/Valjoux 7750 or a Seagull ST19, and neither matches the bridge shape, finishing, or pusher feel of the original.
What is the Vacheron Constantin Traditionnelle Chronograph?
The Traditionnelle line is Vacheron Constantin's classic dress family, defined by a stepped bezel, straight lugs, and a rail-track minutes scale. The chronograph versions add two pushers and a two-register layout, with a 30-minute counter and a small seconds dial. The flagship variant, the Traditionnelle Chronograph Perpetual Calendar in platinum, was released in 2015 in a run of 50 pieces.
Which movement should be inside a real one?
Caliber 1142 beats at 21,600 vibrations per hour, uses a column wheel with a horizontal clutch, and offers about 48 hours of power reserve. Its bridges carry Côtes de Genève stripes, circular graining, and hand-bevelled edges with black-polished screws. The Geneva Seal appears on the movement, and the same certification is printed on the original paperwork.
How do you check the dial and case?
- Signature font and placement: the words Vacheron Constantin sit below 12, with Genève spelled with the accent.
- Applied gold batons: solid, sharply faceted, and seated flush with no glue residue.
- Subdial printing: thin, crisp, and perfectly concentric, never fuzzy or double-struck.
- Case hallmarks: platinum or gold stamps are crisp and deep, not laser-etched and shallow.
- Pusher action: the start, stop, and reset feel crisp with a defined snap, not spongy.
What do counterfeiters get wrong?
Most fakes get the case thickness wrong because a 7750 module adds height that the 1142 does not have. Subdial spacing drifts on the copies, so the counters sit too far apart or crowd the centre. Crown engraving, caseback text depth, and the Maltese cross on the buckle are usually softer than the original.
How do you verify one before buying?
- Ask for a movement photograph and compare the bridge layout to a known caliber 1142 image.
- Check the reference and serial numbers against the certificate and the Vacheron Constantin archive.
- Request service history from an authorised service centre.
- Have an independent watchmaker open the caseback before money changes hands.
Buy only from an authorised dealer or a seller with verifiable provenance. If the price sits far below market and the seller refuses an inspection, walk away.