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               This came out of my
              Tri-Pacer when I installed the new electric
              Turn-Coordinator.  It was working fine when removed.  It
              was probably the original equipment for the aircraft and is dated
              9 June 1959.  The label shows "Burton Manufacturing
              Company, MFRS (Pioneer) Part Number 1721-2U-A2, Ser. No.
              1724".  I have no idea what it would be worth but
              considering what new instruments are costing, I figured a hundred
              bucks was not too out of line for a working unit (correct me if
              I'm wrong).   
               
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