If you were a kid growing up in the 1950s, chances are you had never seen a basketball card before. With interest in the NBA lagging behind baseball, football and even hockey for many, the market was limited. Bowman had produced a one and done set in 1948 but for the next eight years, the hoop landscape was totally barren. That drought came to an end in 1957 when Topps produced its first set of NBA trading cards. Now, the original file copy sets stored by the company 58 seasons ago are on the auction block.