With its launch in 2013, the 1815 RATTRAPANTE PERPETUAL CALENDAR marked a milestone in A. Lange & Söhne’s more recent history: no less than seven chronograph calibres had previously been crafted by the Saxon manufactory. Equipped with a specially developed movement, it united three of the most elaborate complications – very rare in this configuration – while maintaining the classic, elegant design of the 1815 watch family. The outstanding timepiece excels in the measurement of short and long distances: thanks to its eponymous complications, the 1815 RATTRAPANTE PERPETUAL CALENDAR sets standards in both short-time measurement and the display of calendar periods.
 

Technical Details

Movement : Lange manufacture calibre L101.1

Type : Manually wound

Quality : Crafted to the most exacting Lange quality standards, decorated and assembled by hand

Adjustment : Precision-adjusted in five positions

Plates and bridges : Made of untreated German silver

Balance cock : Engraved by hand

Number of movement parts : 631

Number of jewels : 43

Number of screwed gold chatons : 4

Escapement : Lever escapement

Oscillator : Shock-resistant screw balance, superior-quality balance spring manufactured in-house, frequency of 21,600 semi-oscillations per hour, precision beat adjustment
mechanism with lateral setscrew and whiplash spring

Power reserve : 42 hours when fully wound

Functions : Time indicated in hours, minutes and subsidiary seconds dial with stop seconds; rattrapante chronograph with minute counter; perpetual calendar with date, day of
week, month, moon phase and leap year; power-reserve indicator

Operating elements : Crown for winding the watch and setting the time; two chronograph buttons, one button to operate the rattrapante mechanism; separate recessed correctors for advancing the date, day of the week, month, and moon phase

Case dimensions : Diameter: 41.9 millimeters; height: 14.7 millimeters

Movement dimensions : Diameter: 32.6 millimeters; height: 9.1 millimeters

Crystal and transparent caseback : Sapphire crystal (Mohs hardness 9)

Case material : 18-carat white gold

Dial : Solid pink gold

Hands and appliques : Rhodiumed gold; blued steel hour, minute, minute counter, and rattrapante hand; rhodiumed steel chronograph hand

Strap : Hand-stitched alligator leather, dark brown

Buckle : Deployant buckle in 18-carat white gold

Limited edition : 100 watches, edition number engraving, boutique-exclusive