alr2903: the patent filing date was May 16, 1956. Funny coincidence that about the same time down in Appliance Park, my '56 GE Dishwasher in the kitchen centre was rolling off the production line. From what I have learned about the Beatty/Dominion washers, machines based on this patent design seem to have been introduced in 1957 and vanished in 1961; the Dominion brand name seemed to have also been retired at that time. Oddly enough, the new Beatty 62 and 63 models in particular look a heck of a lot by Blackstone designs... Sorry! I got a little off on a tangent there...
Jon: I didn't post each and every photo, but yes, there is a clamp on the lower end of the tub boot. It wouldn't have been very useful otherwise... LOL The upper part of the tub boot slips into a sleeve at the bottom of the tub (which is when we used the remote camera to ensure it was seated properly.
I do still need to do some water testing so keep your fingers crossed! I'll probably only get to that next week, however.