The stamp unit and the base member further have interengaging means to lock or latch each stamp unit in a position in which {HEAD ~ the printing surface} of said stamp unit is in {TAIL ~ level} with the printing surface of the fixed stamp 
is in
The stamp unit and the base member further have interengaging means to lock or latch each stamp unit in a position in which { HEAD ~ the printing surface } of said stamp unit is in { TAIL ~ level } with the printing surface of the fixed stamp
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH