 The class operated in New South Wales, Australia and was the oldest in the Sydney Trains fleet until June 2019, when they were replaced by the Waratah Series 2 (B Set) trains.Prior to their retirement, the S Sets were the last class in the entire fleet that was not air-conditioned, earning them the nicknames "Tin cans" and "Sweat Sets".They were also nicknamed "Ridgys" because of their fluted stainless steel appearance; they shared this nickname with similar looking K sets and C sets.