Short answer
A fake Villeret split seconds watch is a Chinese copy of the Blancpain Villeret rattrapante chronograph. Most copies do not split. The lower seconds hand sits on the same axis as the main hand, and the pusher at 8 o'clock moves a lever that reaches nothing. A working rattrapante needs a clamp, two heart cams, extra levers, and a second column-wheel train. Copy makers skip that. Buyers who pay for a "split seconds" copy get a standard chronograph with a false second hand.
What split seconds means
A rattrapante carries two central seconds hands on one axis. Pressing the split pusher stops the lower hand. The upper hand keeps running. Pressing again releases the stopped hand, which snaps forward and joins the running hand. The function times two events from one start. Blancpain uses the term "split seconds" for it in the Villeret line.
What Blancpain builds
Blancpain dates its founding to 1735. The Villeret line takes its name from the village in the Swiss Jura where the firm started. Blancpain is a Swatch Group brand and has been since 1992. The Villeret split-seconds chronograph uses the in-house caliber 69F8, a manual-wind movement with a column wheel. Blancpain does not publish a part count for that caliber.
Checks that expose a copy
- Split pusher: press it while the chronograph runs. On a copy the hand does not hold, or the pusher does nothing at all.
- Realignment: press the split pusher ten times. A real rattrapante returns to zero offset each time. A copy drifts.
- Hand stack: on many copies the two hands are one hand with a cosmetic second blade. Look at the stack height under a loupe.
- Case thickness: copy cases run thicker than the genuine case to fit the donor movement.
- Movement: most copies use a decorated chronograph base with a dummy split lever. Check the balance wheel and the beat rate on a timing machine against the published rate for the caliber.
- Dial print: compare the Roman numeral stroke weight, the Blancpain script, and the spacing of the Villeret name.
- Caseback: check engraving depth and font. Reference and serial numbers are stamped on older genuine cases.
How to test one in hand
- Wind the watch and start the chronograph.
- Let it run 30 seconds.
- Press the split pusher. The lower hand should stop. The main hand should keep moving.
- Press the split pusher again. The stopped hand should jump and align with the running hand.
- Repeat 10 times. Note any offset.
- Press reset with the chronograph stopped. Both hands should return to 12.
Market notes
Prices for "split seconds" copies run from about US$150 to US$600, based on seller and plating. A working rattrapante module costs more than that on its own. A listing that claims a true split-seconds function at those prices does not describe the watch in the box. Ask for a video of the split pusher in use before payment.
What is not public
Blancpain does not publish yearly production totals for the Villeret split seconds. Reference numbers change between series. Serial ranges for each series are not public. Any page that lists exact production figures is guessing.