A. Lange & Sohne - Tourbograph (mouvement)

The manually wound L903.0 calibre is one of the most extraordinary masterpieces ever crafted by the Lange manufactory. It is composed of over 1000 individual components, has 41 synthetic ruby jewels, and is precision-adjusted in five positions. Six gold chatons are secured with screws to the untreated German silver plates and bridges. The sapphire-crystal back showcases the tourbillon, the chronograph/rattrapante mechanism, and - below it - the fusée-and-chain transmission.

Technical data:
Diameter: 30mm
Height: 8.9mm
Power reserve: 36hours
Frequency: 41
Diamond endstones: 2
Number of parts: 465(chain = 1 part)
Number of chain parts: 633