Quoted from AlexF:That is much closer but this one has bolts with wingnuts for the hold down. It's in that transition era from woodrail to metal cab. I wonder though if that style could be modified to work.
I've wondered the same thing too. I have both styles on my machines including one of the wingnut ones modiifed to work on the later style. I think to use the later one on the early cabinet might require removing some wood and installing the correct receiver.