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 {TAIL ~ said stamp unit} is in level with the printing surface of the fixed stamp 
of
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 { TAIL ~ said stamp unit } is in 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH