Sports Illustrated Swimsuit 1964 Issue
The first issue of the Sports Illustrated Swimsuit Issue actually debuted in 1955 and featured Betty di Bugnano in a one-piece swimsuit. The issue did not sell well and SI put their next issue on hold until 1964 when they debuted the first cover featuring a white bikini. The issue is credited with making the bikini a serious piece of apparel.
Photo Credit: Sports Illustrated