IN THIS CANADIAN VARIETY STAMP THERE APPEARS TO BE A RED SIGNAL LIGHT ON THE WING TIP OF THE AIRPLANE. IT OCCURRED ON SCOTT 874 THE 17 CENT AVRO LANCASTER STAMP OF THE MILITARY AIRCRAFT SERIES ISSUED NOVEMBER 10, 1980. IT IS IN VERY NICE CONDITION. IT IS A USED STAMP. FOR OTHER ITEMS OF PHILATELIC INTEREST ESPECIALLY ERROR STAMPS PLEASE VISIT MY OTHER ADS.