In preferred form, the apparatus includes a body having {HEAD ~ a groove} with {TAIL ~ markings} to define the display area and a display bar that slidably fits within the groove 
with
In preferred form , the apparatus includes a body having { HEAD ~ a groove } with { TAIL ~ markings } to define the display area and a display bar that slidably fits within the groove
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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