The old old PRT (nee PFA, PFT, etc., et al) was ran from pre-1999 (wasn't in before then) up until about May of 2000. Max pushups were 67, max situps were 100. No age tiers until you got to the run/swim, and then it was 10-year tiers. The old PRT ran from May 2000 to October 2002. This was the dreaded lowest score = your overall score version and also introduced 5-year age tiers to all events. In my experience, it led to sandbagging as people would know how well they'd do on their worst event and wouldn't push themselves on the other events. After a while, someone decided the "lowest score = overall score" wasn't good, and that part of the scoring was dropped, leading to the average method that's in use today.