Like the preceding 70th Anniversary set back in 2008 (and almost every other BBM Anniversary set), there are 99 cards in the base set. They are divided up among four different subsets - "Memories Of Hawks" (5 cards), former Hawk players (67 cards), current Hawks players (18 cards) and the "Osaka Classic" subset (9 cards) which features current players in retro uniforms. (This is almost exactly the same breakdown as the 2008 set - that set had a six card "History Of Hawks" subset, 66 cards for former Hawks, 18 cards for current Hawks and nine cards for current Hawks wearing "Turn-Back-The-Clock" uniforms.)
This set fixes the biggest problem that the 2008 set had - the absence of Katsuya Nomura. Not only does Nomura have a "former Hawk" card but he's on at least two if not three of the "Memories Of Hawks" cards. The "Memories Of Hawks" cards feature significant groups of Hawks teammates over the years. One card is labelled "400 Ft Row" which I have been unable to find any information on - the card shows eight Hawks players (I think one is Nomura) from the late 50's/early 60's. The other cards show Mutsuo Minagawa, Tadashia Sugiura and Nomura; Sugiura and Nomura; "Trio The Yamauchi" (Kazuhiro, Takanori and Shinichi Yamauchi, three pitchers with the Hawks in the early 1980's with the same last name but unrelated) and "Young Hawks Starters" (Nagisa Arakaki, Toshiya Sugiuchi, Hayato Terahara and Tsuyoshi Wada from the early '00's).