The manufacture calibre L132.1 is a newly developed movement that significantly distinguishes itself from the caliber L001.1 of the 2004 Double Split. The power-reserve indicator has been shifted down to provide more display space for the rattrapante hour counter in the upper part of the dial. Despite the extended functionality, the engineers succeeded in integrating the additional components in the movement so ingeniously that the case did not have to be enlarged in comparison with the Double Split. A glance through the sapphire-crystal caseback reveals the chronograph movement finished to the highest Lange standards as well as the painstakingly choreographed interaction of wheels, levers, springs, clutches and jumpers that illustrates the stunning complexity of the project.
The L132.1 features a total of 567 parts including 46 jewels. Its diameter is 30.6mm at a height of 9.4mm.