This is a SkyMaster booklet stamp issued Nov.18, 1949. It was one of the last two booklets to be issued at a price of 1¢ above the face value. The cancellation is hard to capture in the pics but clearly reads : RICHLAND WASH 

DEC 27 4 - PM 1951 : 

U.S. TREASURY DEFENSE BOND 

FLAG CITY

The letter & envelope are special stationary the woman had received as a gift. I blotted out some info on the pics, not on the actual item, of course.