ON THIS VARIETY THERE IS A LARGE WHITE EXTRA WHEEL NEXT TO THE CARRIAGE. THIS OCCURRED ON SCOTT 1093 THE 68 CENTS TRANSPORTATION STAMP FROM THE EXPO 86 SERIES ISSUED APRIL 28, 1986. THE STAMP IS IN VERY NICE CONDITION. IT IS A USED STAMP. FOR OTHER ITEMS OF PHILATELIC INTEREST ESPECIALLY ERROR STAMPS PLEASE VISIT MY OTHER ADS.