The Henzi Pfaff 558 watch movement is a gold lever type movement that is commonly associated with automatic (bumper) functionality. It features a sub second display and is designed for automatic winding. The movement is often identified by the signature, which can be found on the dial side and is marked as either 1191 or 1191/1192. The Henzi Pfaff 558 movement was introduced in 1935 and has been in use since then.