In {HEAD ~ an advantageous form} of {TAIL ~ construction}, the dial has at least one magnet, which by rotation of the dial is guidable along the sensors realized in the form of field probes 
of
In { HEAD ~ an advantageous form } of { TAIL ~ construction } , the dial has at least one magnet , which by rotation of the dial is guidable along the sensors realized in the form of field probes
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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