Hi Steve ... long time lurker , first time poster
I can pretty much concur and confirm the 1927 Bub detective work
Heres Mine ! ( in O as opposed to 1 )
You will get an idea of the missing side rods at least
I collect mainly pre-war clockwork from all around the world ( on a very small budget LOL ) so while it may not be a collection of show ponys they bring me joy
Being an Aussie ( Australian) they are pretty thin on the ground out here so its a challenging hobby to say the least , yet it is amazing that any made it out here at all ... Finding something like a mechanical Lionel 1511, you really have to ask how it got 10,000 miles from home