THIS IS A VERY NICE EXAMPLE OF A TAGGING ERROR. INSTEAD OF THE NORMAL TAGGING ON BOTH SIDES OF THE STAMP THERE IS ONLY ONE BAR ON THE RIGHT SIDE OF THE STAMP. THIS OCCURRED ON SCOTT 455 THE TWO CENT CENTENNIAL DEFINITIVE STAMP THAT WAS ISSUED DECEMBER 1972. THE STAMP IS USED AND IN NICE CONDITION. FOR OTHER ITEMS OF PHILATELIC INTEREST ESPECIALLY ERROR STAMPS PLEASE VISIT MY OTHER ADS.