The ref. 701.007 Tourbillon Pour le Mérite has a white gold case and a blue dial; it is said 18 examples were made in this configuration.
Handwound movement with tourbillon escapement and power equalization with chain and fusée. It was one of the movements (and with the Pour le Mérite, watches) that was introduced as the first collection of the resurected A. Lange & Söhne in 1994. The concept was created by Gunter Blumlein while Giulio Papi worked on the chain & fusée mechanism.