A. Lange & Sohne Lange 1 Perpetual Calendar

With its precisely jumping calendar displays and the peripheral month ring, the LANGE 1 PERPETUAL CALENDAR delivers unique mechanical and conceptual solutions. The model version in platinum features a black dial crafted from solid silver.
Case dimension
Case diameter: 41.9 mm
Case thickness: 12.1 mm
Winding mechanism
Self-winding movement
Power reserve
50 hours
Complications
Outsize date, Calendar function, Moon-phase display, Day/night indicator, Day-of-week display
Reference
345.036 E / LSLS3452AA
Dial colour
Black
Case material
950 platinum
Case back: sapphire glass
Case dimension
Case diameter: 41.9 mm
Case thickness: 12.1 mm
Water resistance
3 bar
Movement designation
L021.3
Number of movement parts
621
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, Day/night indicator, Day-of-week display
Leather Strap
Black, Alligator leather
Our alligator straps fully comply with the CITES regulations: Species – alligator mississippiensis. Extraction method – farmed. CITES Appendix – Appendix II
Prong buckle
950 platinum
Distance between lugs
22 mm