Center Line Blocks Collection, 1906-1935. Fresh attractive neatly displayed on hand-designed pages, including #314, 320, 343-7, 368, 71, 373, 484, used 523, mint & used 524 with horizontal or vertical lines (524 with 2 n.h. stamps), 531-2, 535, Farley's, etc; fresh & clean. Estimate  $500 - 750. $0