 These were the standing world and Olympic records (in minutes) prior to the 1912 Summer Olympics.Belle Moore, swimming in the first heat, set the first Olympic record with 1 minute 29.8 seconds.In the second heat Daisy Curwen bettered the record with 1 minute 23.6 seconds, and in the fourth heat Fanny Durack set a new world record with 1 minute 19.8 seconds.