Was lucky enough that one of the gyms I used to go to had several 100lb pairs of these. Im no vintage plate expert by any means but the videos I have using them more closely match this style versus the other 100lb york ones
Pretty basic but good quality monolifts that have been around a long time, and for a good price compared to most. Nothing particularly fancy about them, but readily available.
Pretty rare these days, and even when Iron Wolfe was around I never saw these bars used much in competition personally. The knurling was amazing but the bar didn't flex a ton. Comparable to an Okie or Ohio deadlift bar in terms of whip
This bar was like a perfect cross between a Rogue Squat bar (the whole bar had knurling) and a Texas monster squat bar (huge and 65lbs). Most of my best squats were on this bar