1-3/8x2.25". The 1923 W515-1 "strip card set" consists of 60 individual cards. Each blank-backed card depicts a colorful drawing of a player taken from an Underwood & Underwood wire photograph and prominently displays the copyright symbol and "U & U" at the bottom left. The image is centered near the top of the card while the card number, player's name, position, team and league are printed across the bottom. The set leans heavily toward the New York teams, as 39 of the 60 individual cards are players from the New York Yankees, Giants and Brooklyn Dodgers.

Walter Johnson, nicknamed "The Big Train", was an American professional baseball player and manager. He played his entire 21-year baseball career in Major League Baseball as a right-handed pitcher for the Washington Senators from 1907 to 1927. He later served as manager of the Senators from 1929 through 1932 and of the Cleveland Indians from 1933 through 1935. He is considered one of the greatest pitchers of all time and still holds records to this day. He is the only pitcher in Major League history to record over 400 wins and strike out over 3,500 batters and still holds the all-time record in shutouts with 110. He was a World Series Champion in 1924 and in 1936, Johnson was elected into the National Baseball Hall of Fame as one of its "first five" inaugural members.