T his accessory was manufactured by MAAR, The face of the sphere was remanufactured by an expert watchmaker. The clock was serviced, and the clock hands were restored, and a new lumen was added. This self-winding clock watch functions as a gyroscope, winding itself with acceleration and braking, in addition to turning the steering wheel. One could also rotate the front face of it to hand-wind the mechanism.
The housing body also has two sight windows in the rear so one can view the mechanism. Let the pictures be your guide.