Eclipse weight arms

[Kansas Rust Buzzard]

I am trying to sort some things here, I got a pile of weight arms without castings, now from what I gather, the 12ft arms are 1 1/4x 3/8 and the 14ft arms are 2 1/4x 1/2? Were all 14 foot mills 1/2 thick? My example is very pitted and I assume it was 1/2 but it very well could pass as 3/8 thick. I do not own a 14ft weight or it would answer my question. Any help would be greatly appreciated, I am trying to get my pile organized before the weeds start popping up. Thanks