One hour !!

Great restraints but how is it supposed to work ?
Maybe there is an engineer out there that can build these things .

Mechanical spanker - B.T.Welt

A spanking machine from B.T.Welt. A characteristic of a good spanking machine is that the victim seems to be totally restrained. Often more restrained than if a Mistress or Master were carrying out a punishment. Here the restraints appear to be even more elaborate than the machine itself. The fact that art empahasises features also plays a part in these drawings for as you can see the victims bottom is very large indeed !