News and Events September 2, 2003 admin
Industry News – Lange Tourbillon at Antiquorum Auction
A Lange Tourbillon “Pour le Mérite” was recently sold at Antiquorum for $151,000.
No. 107/150, was produced in a limited edition of 150 examples in 18kt gold in the 1990’s, with only 15 produced in 18kt pink gold. This particular model was sold on March 3, 1999. Production of this reference started in 1994.
The case in 18kt pink gold features a visible one-minute tourbillon regulator, with 36 hours of power reserve.
Movement is the Lange Caliber L 902.0-No. 432, with a Glashütte three-quarter plate, with the movement being decorated and engraved by hand. It has 29 jewels including 5 in screw-mounted gold châtons, a tourbillon cage bearing 2 diamond endstones, a lateral lever escapement with a one-minute tourbillon regulator with polished-steel equidistant three-arm carriage, and a Glucydur balance with screws, adjusted to 5 positions.
It also features a Nivarox balance-spring with overcoil invented by Prof. Strasser, power equalization with chain and fusée, maintaining power and stepped planetary gearing, shock-absorber, and a self-compensating Breguet balance-spring. The case diameter is 38mm.
This is the only model produced today, utilizing power equalization with chain and fusée. It is only 12.3 mm. in diameter, with the tourbillon itself comprising 76 components, weighing less than half a gram. The planetary transmission gear, compensating for the decreasing power of the mainspring, is built into a miniature cone, measuring only 10 mm. in diameter at its base. Yet it comprises 38 separate parts.