Lange & Söhne Zeitwerk

• Digital Jumping Time: Left window is the hour - 10, Right window is the minutes - 07. So it's 10:07. At the top of each hour, all three discs for hour and minutes jump instantaneously.
• Small Seconds: The sub-dial at the bottom with blued steel hand, showing ∼38 seconds.
• Power Reserve: Top sub-dial marked AUF / AB (German for Up / Down). Tells you when to wind. Original caliber has 36 hours, 2nd gen has 72 hours.
• Case & Dial: 41.9mm polished white gold case, solid silver dial in rhodié grey with fine guilloché textures, brown leather strap. Hand-finished German silver movement.

Movement: Manufacture Caliber L043.1, manual-wound, 36 jewels, 18,000 vph, with patented constant-force escapement (remontoir) that provides the massive energy needed to make the three time discs jump at once.

It's one of the most complicated non-tourbillon Lange w