A replica 1815 Rattrapante is a copy of the A. Lange & Söhne 1815 Rattrapante Perpetual Calendar, a manually wound split-seconds chronograph with a perpetual calendar. Replicas reproduce the 41.9 mm case, the twin chronograph hands and the four-subdial layout. The split-seconds function is the hardest part to copy, so the second hand on most replicas cannot be stopped independently of the first.

What is the A. Lange & Söhne 1815 Rattrapante?

The original pairs a rattrapante chronograph with a perpetual calendar and moon phase inside the L101.1 movement, a hand-finished caliber with several hundred parts. Lange introduced the model in 2013 and added a Honeygold "Homage to F. A. Lange" edition limited to 100 pieces in 2020. The case comes in platinum, pink gold or Honeygold with a solid silver dial.

How close is a replica 1815 Rattrapante to the real watch?

At arm's length a good replica captures the stepped lugs, the case profile and the printed dial. Up close the gap shows in finishing, materials and function.

• Movement: the L101.1 is in-house and hand-engraved; replicas use a third-party chronograph base.
• Split-seconds: the genuine rattrapante lets you stop one hand while the other keeps running. Many replicas move both hands together.
• Calendar: the original tracks leap years for decades; replicas often show a simple date or pointer display.
• Dial: solid silver with applied gold markers against brass or plated base metal on copies.

What movement sits inside a replica 1815 Rattrapante?

Most versions use a Chinese chronograph base such as a Sea-Gull ST19 or a modified 7750, with a decorative module stacked on top to mimic the split-seconds gear train. A small number of higher-tier builds fit a working rattrapante module, and those are the only copies where the second chronograph hand separates on command. Ask the seller for a video of the pusher at 10 o'clock before you pay.

What should you check before buying?

• Pusher test: press the rattrapante pusher and watch whether the upper hand stops while the lower one continues.
• Thickness: copies often run 1 to 2 mm taller than the 41.9 mm original.
• Markers: applied indexes should sit above the dial with crisp, polished edges.
• Hands: blued finish with tips that reach the minute track.
• Caseback: sapphire crystal over a finished movement, not a printed plate.
• Water resistance: most replicas handle splashes only, so keep them away from pools.

How much does a replica 1815 Rattrapante cost?

Entry copies with a cosmetic split-seconds run about $200 to $400. Mid-tier builds with a cleaner dial and an ETA-style chronograph land near $500 to $900. The rare units with a true rattrapante module usually start around $1,200. Genuine examples sell well into six figures at auction, so price is the fastest way to tell which tier you are looking at.

Are there legal or ownership issues?

Replica watches infringe trademarks and cannot be serviced by the manufacturer or its authorized partners. Selling them carries legal risk in the United States and the European Union, and resale value is close to zero. A used split-seconds chronograph from a mainstream brand costs far less than a Lange and can be repaired, insured and resold.