The replica 1815 Rattrapante is a copy of A. Lange & Söhne's split-seconds chronograph, a manually wound watch with a second chronograph hand that can be stopped to time a lap while the first hand keeps running. Replica versions split into two groups: watches with a genuine working split-seconds mechanism, and watches with a fixed or decorative second hand. The working versions cost more and come from a small number of factories.
What makes the 1815 Rattrapante different from a standard chronograph?
A standard chronograph runs one seconds hand for the stopwatch. A rattrapante adds a second hand stacked on top of it, driven by its own wheel and clamp. Press the pusher at 10 o'clock and the split hand freezes while the main hand continues, which lets you read two elapsed times at once. Press again and the split hand snaps back into alignment.
How the split-seconds function works
Inside the movement, an isolating mechanism, usually a clamp or a beak, grabs the split-seconds wheel and holds it still. Traditional designs use a column wheel to coordinate the start, stop, and split actions, plus a horizontal gear train. Each added part increases thickness, which is why Lange's original case sits around 13.9 mm tall on a 41.2 mm diameter.
Movement options in replica 1815 Rattrapante watches
- Asia 7750 base with a bolt-on split module: the most common working option, thicker and louder than the original.
- Custom clone with column wheel and rattrapante levers: closer in feel and finish, higher price.
- Decorated non-working twin hands: looks right on the wrist, but the split pusher does nothing.
What to check before buying
Split-seconds action
Ask the seller for a video of the split pusher. The split hand should stop dead, hold position for several seconds, and return to zero alignment without a jump. A wobbly hand that drifts or refuses to re-align points to a weak module.
Case and dial proportions
Compare the case diameter, lug shape, and dial layout against the original. The 1815 line uses a clean railway-track minute ring, printed Arabic numerals, and a small seconds subdial, so any misaligned printing is easy to spot.
Finishing details
Look at the movement side if the caseback is sapphire. Real Lange movements show hand-engraved balance cocks and Glashütte ribbing. Replicas rarely match this, though upper tiers get close with laser engraving.
FAQ
Does the split-seconds hand work on replica 1815 Rattrapante watches?
On high-tier versions, yes, the split pusher starts and stops the second hand independently. On budget versions, the second hand is fixed and only the main chronograph runs.
How much does a replica 1815 Rattrapante cost?
Expect a wide range. Decorative twin-hand models sit at the entry level, while working split-seconds replicas with a column wheel movement sit several times higher.
Is it a 1:1 clone?
No replica is a true 1:1 clone of a Lange calibre. The closest versions copy the case, dial, and split-seconds behavior, but the internal architecture remains a modified mass-produced base.