The Wittnauer 11KS watch movement, with options including a bimetallic screw balance and Breguet hairspring, is available in three different heights: 4.1mm, 4.75mm, and 5.0mm. Its bridge shapes differ from those of other versions. These calibres have limited documentation and the designation of 99 is supplemented with construction height and generation number in this archive. The movement features stem wind and set functionality, a sub second hand, and was commonly used around 1935.