A. Lange & Söhne Richard Lange Perpetual Calendar “Terraluna” Watch
By Jovan Krstevski
The Richard Lange Perpetual Calendar “Terraluna” is one of our favorites from the SALON INTERNATIONAL DE LA HAUTE HORLOGERIE 2014. This beautiful timepiece combines a perpetual calendar, regulator display, 14-days power reserve and a constant force escapement. On its case back, this watch features a brand new orbital moon-phase display.
The dial is well designed and brings out many pertinent aspects of this watch. The regulator-layout is build around three circles, moreover the perpetual calendar is unique; the biggest draw is the back of the “Terraluna” that hosts a very complicated and unseen orbital moon-phase.
The mechanism reproduces the synodic month of 29 days, 12 hours, 44 minutes, and 3 seconds, meaning that it takes 1058 years before the display needs to be corrected by one day. The movement used is the Movement L096.1.
My personal choice is the pink gold version.
Lange manufacture calibre L096.1, manually wound; crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; twin mainspring barrel; constant-force escapement with remontoir spring produced in-house; three-quarter plate made of untreated German silver; balance cock engraved by hand
Movement parts: 787
Screwed gold chatons: 1
Escapement: Lever escapement
Oscillator: Shock-resistant screw balance and superior-quality balance spring manufactured in-house, frequency 21,600 semi-oscillations per hour, precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 14 days (336 hours) when fully wound Functions
Time indicated in hours, minutes, and seconds; perpetual calendar with outsize date, day of week, month, and leap year; power-reserve indicator; orbital moon-phase display with day/night indication on the movement side Operating elements
Crown for winding the watch and setting the time; push piece for advancing all calendar displays; recessed push pieces for separate correction of month, day of week, and moon phase Case dimensions: Diameter: 45.5 millimetres, height: 16.5 millimetres Movement dimensions: Diameter: 37.3 millimetres; height: 11.1 millimetres Crystal and back: Sapphire crystal (hardness 9)
References: 180.032 -or- 180.026
Case: Pink gold -or- White gold
Dial: Solid silver, argenté -or- Solid silver, argenté
Hands: Pink gold -or- Blued steel
Strap: Hand-stitched crocodile strap, reddish-brown -or- Hand-stitched crocodile strap, black
Buckle: Lange deployant buckle in solid pink gold -or- Lange deployant buckle in solid white gold
Jovan Krstevski – Founder, Proprietor & Executive Editor
Watch collector, aficionado and a Event profile in the Swedish nightlife. He launched Watchgeek back in 2011, which is now known as WristReview. He quotes ’WristReview is a site to help people find, explore, discover and enjoy wristwatches.’ His passion jump started in his early teens, when he was given his first mid-range wristwatch which was an Omega Seamaster. Since then he has always been in love with wristwatches!