Abstract: A non-reversible battery and mounting assembly for an electrically powered watch includes a battery having a casing defining a generally cylindrical configuration with an annular radially extending shoulder adjacent one end thereof for engaging an inwardly directed shoulder on a battery cavity of a component housing. The shoulder within the component housing being positioned such that the battery will fit within the cavity in only one orientation with a retaining ring engaging the flange on the battery case for retaining the battery within the housing. The back of the battery also serves as the back of the watch case eliminating the need for a separate back therefor. The retaining ring is provided with a hole for receiving the point of a ballpoint pen or similar object for use in removing the retainer ring.

Abstract: An electronic watch module includes a circuit board having all the electronic watch components including a plurality of LED's and a CMOS integrated circuit device mounted on one side thereof defined as the face of the board. The board is of a generally flat circular configuration and having generally rectangular cutouts at the upper side thereof for mounting a crystal oscillator and a pair of arcuate slots or cutouts along the edge thereof for mounting a pair of elastomeric switch contact members. A cover for the board includes a transparent portion defining a transparent portion sealingly enclosing the LED's and an opaque portion defining an opaque compartment for sealingly enclosing the CMOS integrated circuit device. The cover is hermetically sealed to the board for sealing these components. The overall layout of the circuit on the board is related to guide flats to facilitate automatic testing.