THIS IS A VERY NICE EXAMPLE OF A TAGGING ERROR. INSTEAD OF THE NORMAL TAGGING ON BOTH EDGES OF THE STAMP THERE IS ONLY ONE WIDE CENTER BAR. THIS OCCURRED ON SCOTT 589 THE FOUR CENT MACKENZIE KING+ DEFINITIVE. THE STAMP WAS ISSUED OCTOBER 17, 1973. THE STAMP IS IN MINT NEVER HINGED CONDITION. FOR OTHER ITEMS OF PHILATELIC INTEREST ESPECIALLY ERROR STAMPS PLEASE VISIT MY OTHER ADS.