A. Lange & Sohne Zeitwerk Ref. 140.029 - Serial #191374 (Pre-Owned)A true icon from A. Lange & Sohne is the brilliant Zeitwerk. The creators of the Zeitwerk were presented with unique and extremely challenging obstacle to overcome. For 59. 9 seconds of every minute, the movement has relatively smooth sailing to contend with. It is only at the last tenth of a second is the movement tasked with moving either 1, 2, or 3 super heavy discs to reflect the new time. To overcome the vast imbalance between the 59. 9 seconds