The timepiece further includes {HEAD ~ a seconds zero reset mechanism} operative to reset {TAIL ~ the seconds hand} to zero 
operative to reset
The timepiece further includes { HEAD ~ a seconds zero reset mechanism } operative to reset { TAIL ~ the seconds hand } to zero
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH