A. Lange & Söhne, Langematik Perpetual Calendar, Ref. 310.025

SPECIFICATIONS Brand: A. Lange & Söhne Model: Langematik Perpetual Calendar  Reference Number: 310.025Movement:  Automatic Condition:  Very good Gender: Men’s Time Period: 2001-presentBox: No Papers: No THE CALIBER  Caliber: L922.1 Jewels: 43 THE CASE Case Material:  Platinum Case Diameter: 38.5 mm  Thickness: 10.4 mm  Waterproof: 100 ft./ 30 m./ 3 ATMBezel Material: Fixed Platinum  Glass: Sapphire CrystalCaseback: Open Dial: Matte silver Dial Numerals: 18K white gold applied Roman numerals & square-shaped faceted hour indices, black minute railway track around the outer rim THE BRACELET / STRAP Bracelet Material: Black Leather Buckle: Ardillon buckleBuckle Material: Platinum signed Lange THE FUNCTIONS Perpetual calendar, subsidiary dial for the day of the week combined with the 24-hours and day/night indication at the 9 o'clock position, constant small seconds sub-dial combined with the moon phase at 6 o'clock, a sub-dial at 3 o'clock registers the months, and leap year, a lar