THIS VARIETY, THE RED THUMB, WAS ISSUED MAY 30, 1975 AND IS ON THE 8 CENT MARGUERITE BOURGEOYS OF THE CANADIAN PERSONALTIES SERIES THE STAMP IS ON A MINT NEVER HINGED BLOCK OF FOUR AND IS IN EXCELLENT CONDITION. FOR OTHER ITEMS OF PHILATELIC INTEREST ESPECIALLY ERROR STAMPS, ANTIQUES AND VINTAGE COLLECTABLES PLEASE VISIT MY OTHER ADS.