The movement of the stem in {TAIL ~ the axial direction} is detected by a first switch means, and the rotation of the stem at the second and third positions is detected by a second switch means, whereby any one of the four display items is corrected depending upon {HEAD ~ the state} of the two switch means 
The movement of the stem in { TAIL ~ the axial direction } is detected by a first switch means , and the rotation of the stem at the second and third positions is detected by a second switch means , whereby any one of the four display items is corrected depending upon { HEAD ~ the state } of the two switch means
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH