Without a doubt my FAVORITE SET - PERIOD. Regular issue, test issues, inserts ... whatever ... this is # 1 !!!

Similar to the early 1900's Mecca Double Folders, these colorful 2-1/16" x 4-7/8" cards are actually 2-cards-in-1 ! Perforated in the center, you can fold to create cards of 2 different players. Unperforated 1955 Topps DoubleHeaders exist. All 132 players (66 cards) in the 1955 Topps DoubleHeaders set were also in the regular 1955 Topps set, with the same action image.
NOTE: Laid side-by-side the cards form spectacular scenes from actual stadiums !!!
Old-timers - can you identify the stadiums ?

ROOKIES:
  Harmon Killebrew, Hal Newhouser
STARS:
  Ted Williams, Hank Aaron, Jackie Robinson ...

Competition was raging between Topps and Bowman in 1953 and 1954 leading to problems with both companies sets. Bowman caused Topps to missing 6 cards in 1953 with Topps getting revenge by signing Ted Williams to an exclusive contract in 1954. Bowman then had to pull Ted Williams card #66 from their set shortly after they started printing, replacing it with Jimmy Piersall, who also was on card #210 making the 1954 Bowman Ted Williams #6 one of 50's scarcest cards.

Perhaps distracted by it's competition with Topps, the 1954 Bowman set was filled with errors and variations. Nearly 20% (40/224 cards) had some sort of variation, with some having more than 2.

The St. Louis Browns recent move to Baltimore also made things interesting. Bowman's artists had no idea what an Orioles jersey would look like - so they just madeone up.