The LANGE 31 Rose gold replica watches is set to be available in november 2009 with retail price at $114,000

A. Lange & Sohne, of Glashütte, Germany, has just announced a new rose gold version of the LANGE 31. The LANGE 31 was originally introduced two years ago, in a platinum case. Over the last 2 years, senior designer, Martin Schetter, has worked with his design team to create a new variation. Two years seems like a whole lot of time, just to create a new variation of a timepiece. It is, but, Lange imposes so many quality and design requirements when creating a timepiece, that it takes this long. The results are worth the wait, as this Saxon manufacture produces some of the most beautiful timepieces in the world.

The LANGE 31 is the world’s first mechanical watch to boast a power reserve of 31 days and a constant-force escapement that powers the going train with constant torque delivery. The enormous amount of energy needed to keep the watch running so long is transferred to the movement with a winding key and stored in a twin mainspring barrel. This guarantees that the balance receives an identical amount of energy every ten seconds, regardless of the state of wind of the springs.

A movement with such a large power reserve requires a lot of space. The movement alone, has a diameter of 37.3 mm and 9.6 mm thick. The requisite case is quite large. In fact, this is the largest A. Lange & Sohne timepiece available. For reference, Lange watch cases are generally 38 to 42 mm wide and 9 to 14mm thick. The case on the LANGE 31 is 45.9 mm wide by 15.9 mm thick. It’s big.