The A. Schild 1153 watch movement, designed around 1975, features a manual winding capability and a pin-lever escapement. It also integrates a sweep seconds hand and a calendar function for displaying the date. The movement is labeled with calibre designations of either 420 or 420/425. However, due to scattered and unreliable sources, a thorough analysis of the correlations between these designations and specific features is not feasible.