The Langendorf 1105 watch movement was jointly developed by Hamilton-Buren, Breitling, and Heuer during the period 1969-. It features the Dubois-Depraz 8510 module on a modified Buren 1281 base with a crown positioned at 9 o'clock. The movement incorporates a micro rotor and an indirectly driven minute hand, allowing for a low-profile design. It functions as an automatic chronograph with a 60-second and 30-minute counter, cam switched. Additionally, it includes a sub-second dial at 10 o'clock and a date function, which can be set by changing the 21-24 hour mark. The movement is both automatic and equipped with KIF Shock Protection.