The perpetual calendar display of Lange 1 Tourbillon Perpetual Calendar is neatly arranged near the time display, and all the information is clear at a glance. This masterpiece is now available in its latest model with a plain white 18K gold case and grey dial.
LANGE 1 TOURBILLON PERPETUAL CALENDAR white 18K gold
Lange 1 Tourbillon Perpetual Calendar is paired with two classic and complex installations, combined with the unique design of Lange’s famous series. The perpetual calendar device consists of a large Lange calendar, retrograde week and leap year displays, and an external month ring. The time and date are clearly displayed and all information can be easily read at a glance. All perpetual calendar displays can be advanced instantly. The perpetual calendar device did not need to be adjusted for one day until 2100. The moon phase display set in the small seconds dial only needs to be corrected by one day after 122.6 years.
The lettering below the 12 o’clock position implicitly signals the presence of the tourbillon. The sophisticated technology of the tourbillon can be seen through the sapphire crystal caseback. The movement is equipped with Lange’s patented stop-second device. After the crown is pulled up, the balance wheel in the tourbillon frame stops immediately, which is safe and reliable, and ensures that the watch setting is accurate to the second. The top of the tourbillon frame is polished in black, which is the most complicated and time-consuming of many manual surface treatments. The tourbillon frame’s bearings feature a diamond end stone to pay tribute to the long-established Lange 1A pocket watch.
The central part is made of 21K gold with a solid center automatic dial and a platinum 950 centrifugal wheel on the periphery, which effectively tightens the spring of the L082.1 automatic winding movement, which increases the watch’s power reserve in a short time To 50 hours. Other classic Lange quality marks include a carefully decorated movement, hand-engraved tourbillon and intermediate wheel splints, and six screw-fixed gold sleeves.
LANGE 1 TOURBILLON PERPETUAL CALENDAR Model 720.038F
Movement Lange-made L082.1 movement; self-winding, carefully modified and assembled by hand; five-way precision adjustment; splints and bridges made of untreated German silver; single-winding automatic turntable center Made of 21K gold with platinum 950 centrifugal wheel; hand-engraved middle wheel and tourbillon splint
Movement parts 624
Gem bearing 76, including 1 diamond end stone
Screwed gold sleeve 6, including 1 diamond end stone
Escapement system lever escapement system
Oscillation system Anti-vibration balance with eccentric weight, self-made balance spring, vibration frequency up to 21,600 times per hour
Power reserve: 50 hours after fully winding
Functions Hours, minutes and small seconds; tourbillon with patented stop-second device; perpetual calendar with large calendar, day of the week, month and leap year display; day / night display; moon phase display
Operating element Crown for winding and setting time; hidden buttons can advance all calendar displays at the same time or independently correct month, week and moon phase displays
Case dimensions Diameter: 41.9 mm; thickness: 12.2 mm
Movement size diameter: 34.1 mm; thickness: 7.8 mm
Crystal and case back Sapphire crystal (Mohs hardness 9)
Case White 18K Gold
Dial Solid silver, grey
18K yellow gold rhodium-plated hands
Strap Hand-stitched alligator strap, black
Clasp Lange white 18K gold folding clasp