Wow - what a find! My mom's early machine was a White Rotary also, but probably a bit newer than that one. I think it's from the 40's.
BTW - if you don't find the wood cover that goes in front of the machine, I may have one. Measure the opening and PM me and I'll see if the one I have is the correct size. I got it in with a lot of other stuff, so I'll be happy to find it a home!