Calibre L902 is a tourbillon watch movement from A. Lange & Söhne.

Cal. L902.0 was introduced in 1994 and was used in the A. Lange & Söhne Tourbillon "Pour le Mérite" through 1999. It is a tourbillon movement with Fusée & Chain. The movement features 29 jewels, 2 diamonds, and 7 chatons. The Nivarox balance spring adjusts using screws and operates at 18,000 A/h.