A. Lange & Sohne Lange 1 Tourbillon Perpetual Calendar

The LANGE 1 TOURBILLON PERPETUAL CALENDAR is the most complex member of the LANGE 1 family. It takes a glance through the sapphire-crystal caseback to reveal its tourbillon. The model version in white gold features a grey dial crafted from solid silver.
Case dimension
Case diameter: 41.9 mm
Case thickness: 12.2 mm
Winding mechanism
Self-winding movement
Power reserve
50 hours
Complications
Outsize date, Calendar function, Moon-phase display, Tourbillon, Day-of-week display, Day/night indicator
Reference
720.038FE / LSLS7203AB
Dial colour
Grey
Case material
18-carat white gold
Case dimension
Case diameter: 41.9 mm
Case thickness: 12.2 mm
Water resistance
3 bar
Movement designation
L082.1
Number of movement parts
624
Winding mechanism
Self-winding movement
Power reserve
50 hours
Balance frequency
21,600 semi-oscillations per hour (3.0 Hz)
Complications
Outsize date, Calendar function, Moon-phase display, Tourbillon, Day-of-week display, Day/night indicator
Leather Strap
Black, Alligator leather
Our alligator straps fully comply with the CITES regulations: Species – alligator mississippiensis. Extraction method – farmed. CITES Appendix – Appendix II
Deployant buckle
18-carat white gold
Distance between lugs
22 mm