A. Lange & Söhne Datograph Perpetual Tourbillon

Reference:

• 740.036 platinum
• 740.056 white gold
• 740.055FE Honeygold “Lumen”

Movement:

• Manual winding movement L952.2, 18,000 A/h
  • Model “Lumen” with L952.4
• Chronograph in classical column-wheel design with flyback
• Big date, small seconds
• Precision adjustment: shock-resistant cam-poised balance
• Plates and bridges in untreated nickel silver
• Balance cock engraved by hand
• Intermediary wheel cock and tourbillon bar engraved by hand
• 59 jewels, including 5 in screwed gold chatons
• 2 diamond capstones
• Diameter: 32.6 mm; height: 9 mm
• 729 components
• Power reserve 50 hours

Case:

• Platinum / 18 ct white gold
• Ø 41.5 mm, height 14.6 mm
• Sapphire crystal
• Six-fold screwed sapphire crystal caseback

Dial:

• Black / solid red gold
• Appliques and indices in solid gold
• Hands in rhodinatedem gold and blued steel
• Hours and minutes hands as well as hour indices at 3, 6, 9 and 12 o'clock coated with Superluminova

Functions:

• Hours, minutes
• Flyback chronograph with central 60-seconds counter and precisely jumping 30-minutes counter at 4 h
• Small seconds via tourbillon, patented hacking seconds
• Moon phase indication at 6 h
• Perpetual calendar with big date, day of week, month, leap year
• Day/night indicator
• Power reserve indicator at 9/10 h
• Tachymeter scale

Bracelet:

• Black/dark brown Alligator leather strap, hand-sewn, with folding clasp

Limited edition:

• 100 pieces
• Honeygold “Lumen” 50 pieces

Price:

• 285,000 € (white gold version, 2020)