US Patent 7177234 Wristwatch with removable face

A wristwatch including a casing having top and bottom parts and a movement therein, an upper housing, a replaceable watch face and a means for releasably securing the upper housing to the top part of the casing. The upper housing is formed as an integral unit, and includes top and bottom transparent panels, a drive shaft means extending through the bottom transparent panel, the drive shaft means having top and bottom ends, time indicating hands fixed to the top ends of the drive shaft means, and side walls fixed to and maintaining the top and bottom transparent panels spaced apart to define a chamber therein for enclosing the time indicating hands. The replaceable watch face includes a memory element, and a flat panel display disposed over the memory element. The replaceable watch face is situated below the bottom transparent panel and above the casing top part, and the bottom end of the drive shaft means is releasably coupled to the movement.