Accompanied by an A.Lange & Söhne cardboard case.
The rarity of this timepiece lies in its highly desirable drum-shaped case measuring just 36 mm. as compared to the more commonly designed case size of 38 mm. This is the first time and to the best of our knowledge that such a rare example has been offered at auction.
The Tourbillon Pour le Mérite was introduced into the market in 1994, produced in a limited edition of just 150 examples, 15 examples in pink, 15 in white and 120 in yellow gold. Another 50 examples were produced in platinum and 1 in stainless steel. The present watch bears the number 89.
Lange's Tourbillon Pour le Mérite is a highly complicated timepiece incorporating a number of fascinating technical details never before applied to a wristwatch, most notably the going train driven with a chain and fusée invented by Professor Strasser. This ultra complicated mechanism optimises the rate accuracy of the watch and is visible through an aperture in the movement's plate. A highly sophisticated planetary gearing system keeps the power to the going train steady even when the watch is being wound.
According to research, it appears that the Tourbillon Pour le Mérite is one of only two wristwatches known today fitted with a chain and fusée for power equalisation. The other model is Lange's "Tourbograph Pour le Mérite" with a tourbillon regulator and split seconds chronograph, introduced into the market in 2006.