1851 3¢ Calendar Collection, complete set of 366 stamps with clear date postmarks mounted on exhibit pages, including Jan. 1, Feb 29, Jul. 4 and Dec. 25, includes a couple ob's, some faults and cut margins but clear strikes throughout, very unusual and difficult to assemble; also includes 12 extra dates on title page stamps catalog over $5,670. Scott No. 11/11A  Estimate $1,000 - 1,500. $0 (Image)