mmm that dont sound right, sure i have heard differant on this forum. 250 yes as a mono for pre 75, but never heard of the 125 mono shock as pre 75 kosha, be intierested in a ruling on that one, as a deffinate.
i was under the impression it was a cut off as it was the 1975 model, hence not pre 75.
i though the A/B where prefixed 453, then the 75 stuff was another number