PAIRS
PAIRS:    8/1/11 to 1942, 1946-Jan.52, 1953-present,
          Tabs 1947-60 (except Nov.-Dec. 1951), Stickers 1962-86.
SINGLES:  1905 to 7/31/11, 1943-45, Feb.-Dec.1952,
          Tabs 1943-45, Nov.-Dec. 1951, Stickers 1987-present.