A. Lange & Söhne Langematik Perpetual Calendar Platinum
Manufacturer: A. Lange & Söhne
Model: Langematik Perpetual Calendar
Reference Number: 310.025
Condition: Very good
Time Period: 2001 - present
Retail / Compare-At Price: $97,900
Our Best Price: $46,000
Case Material: Platinum
Case Diameter: 38.5 mm
Thickness: 10.4 mm
Waterproof: 100 ft. / 30 m.
Water Resistance: 3 ATM
Material Bezel: Fixed Platinum
Glass: Sapphire crystal
Dial: Matte silver
Dial Numerals: 18K white gold applied Roman numerals & square-shaped faceted hour indices, black minute railway track around the outer rim
BRACELET / STRAP
Bracelet color: Black
Bracelet Material: Leather
Clasp: Ardillon buckle
Clasp material: Platinum signed Lange
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 large double-digit date aperture window is at 12 o'clock, hours, minutes, 46-hour power reserve,
The round shape solid three-body case, rounded bezel, and downturned lugs are polished/brushed.
18K white gold and luminescent alpha-shaped hours/minutes hands, alpha-shaped and stick-shaped sub-dial hands
Double windows for date with white gold frame
Three-body case with sapphire crystal display case back secured by six screws
Platinum fluted push/pull crown with A. Lange & Sohne engraving
Sapphire crystal display case back secured with six screws
"Zero Reset" that resets the seconds hand to zero when you pull out the crown to adjust the time, making it extremely easy to precisely synchronize the watch.
The mechanical automatic self-winding A. Lange & Sohne caliber L922.1 "Sax-O-Mat" movement is Glashütte 3/4 plate in German silver, with fausses côtes embellishment. It has a shock absorber mechanism, and is constructed with a straight-line lever escapement, and a monometallic balance that's adjusted to temperatures and 5 positions. It includes a self-compensating flat balance spring, a swan neck micrometer regulator, a 21K gold bi-directional microrotor with platinum segment, and a hand-engraved balance bridge.
This mechanism oscillates at the frequency of 21,600 vph (4 Hz).
Incomplete (no box, no papers)