Consequently many of the gifted athletes of the 1950 - 60s can not be seen during their primes .
It was n't until the 1970s when videotape became less costly that many of the matches were preserved .
Many of the gifted athletes of the 1950 - 60s can not be seen during their primes .
It was n't until the 1970s when videotape became less costly that many of the matches were preserved .