1950's Official Major League BaseballsThe value of the baseballs will vary depending on which league the baseballs are from, and the League president that is stamped on the ball.Official American League baseballs from the 1950's had a Reach Trademark and the William Harridge league president stamping until 1959 which had the stamping of League President Joe Cronin. They could have a value of about $200. for the 1959 baseballs and up to $400. for the older William Harridge stamped baseballs. The National League Spalding Trademark baseballs with the Ford Frick and Warren Giles stampings have a value of about $200.-$250. These price are general and will vary based on age and condition