Jon- based on those pictures, Cabinet #3 is very like the one SteveH is taking. It's old enough to fit in with his collection, and I've got the "New Domestic" for mine. They are very similar, however the older one does not have the shuttle carrier that can use the chain stitch adapter.
My plan has been to start putting the info on SteveH's site, so it will stay together. If he decided he wants to sell an ebook on it all to help cover the costs of the site, I'd be OK with that. At least I've got them organized a bit. It's been real fascinating to look at similarities and differences on the US made High arm 1890-1930 era machines.