ON - Blyth squared circle (-/NO 7 / 9-) ties 3¢ Small Queen on beautiful Blyth Roller Flouring Mil advertising cover to Clinton. (RF 90, 11 reported covers). This cover is illustrated in the squared circle handbook, illustrated on the front cover of the Hennok auction catalogue (Bennett) and is a showpiece. Ex Siverts, Hennok, Kerzner, Draves. (Image)