Abstract: A lock apparatus for securing a hand-stamping device to prevent an unauthorized stamping operation includes two locking heads constructed to establish a ridged interconnection with the base frame and the upper actuator frame of the hand-stamping device. The locking heads are releasable interconnected by parallel spaced apart struts for connecting the locking heads in a space apart relation for receiving the hand-stamping device between the struts whereby the locking heads and the struts encircle the outer periphery of the hand-stamping device. A lock is used to interlocking the locking heads in a spaced apart relation between the struts.