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18¢ Space Achievements Benefiting Mankind, block of 8 (Price $2.75)
#2631-4
29¢ Space Accomplishments, block (Price $2.00) ...
The USPS seems settled into the press-sheet habit, although U.S. stamp formats continue to vary. For example, the Space Achievements uncut press sheet, shown in Figure 3, Scott 3409-13, consists of five dramatically differing souvenir sheet panes.
 See also: Block, Mars Pathfinder, Strip, Souvenir sheet, Sheet
  
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