US Patent 7363687 Snapping and hinging arrangements, watches and associated methods

A magnet assembly connectable to a metal assembly in an engaging fashion, a metal assembly connectable with the magnet assembly in an engaging fashion and a snapping mechanism comprising the magnet assembly and the metal assembly are disclosed, to be used with a strap and a watch case. A leaf spring element and a base element to be used with a watch case are also disclosed, together with manufacturing processes and a system and method to teach the concept of time.