1952 Bowman # 8 Pee Wee Reese (Brooklyn Dodgers)

1952 is often thought of as Topps 1st baseball card set, but it was not.
Topps issued several smaller baseball card sets prior to their huge 1952 set.
Topps buzz word was "BIGGER is BETTER" for their 1952 Topps set which Topps described as: "GIANT IN BOTH SIZE and NUMBER of CARDS" (407).

Key card in the 1952 Topps set is #311 MICKEY MANTLE. Often called Mickey Mantle's Rookie card - BUT IT IS NOT. That honor goes to his 1951 Bowman.
1952 Topps "High Numbers" (#311-#407), are very, very scarce with an interesting story:
This HUGE set was released in series weeks apart. By the last (6th) series, baseball season was over and football starting. Candy shops had plenty of baseball cards from earlier series so most cancelled their orders for the last series creating the scarcity.

Adding interest is how Topps disposed of the now un-needed cards including THOUSANDS of 1952 Topps MICKEY MANTLE's. They dumped them into the Atlantic Ocean like most of New York's trash in those days.

1960 & 1961 Fleer baseball card sets of old-timers like Babe Ruth bombed. Kids wanted Willie Mays & Mickey Mantle. Topps had rights to baseball cards & gum so Fleer tried something new ... COOKIES !!!
Cherry flavored cookies with 1963 baseball cards.
1963 Fleer baseball card set was cut short at 66 cards & checklist by Topps lawsuit. But what 66 cards! Attractive & packed: Clemente,Koufax... & 2 very scare Short Prints.
Maury Wills 'rookie' card is a story. Majors in 1959, quickly superstar. But 1963 for rookie ??? In 1959 Topps deemed Wills NOT WORTHY.

Wills was upset. After 1962 MVP, Topps came knocking but he said "NO!". Finally, 1967, Wills first Topps & most costly card. Note: 1961 Post Cereal card, years BEFORE 'official' rookie. He also photo-bombed a 1960 Topps card.

Disclaimer: Above mostly true - but Wills has said "no feud".