Electric timer with program carrier switchable from {HEAD ~ a short term} to {TAIL ~ a long term program} 
Electric timer with program carrier switchable from { HEAD ~ a short term } to { TAIL ~ a long term program }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL