Hoosier (?) Cabinet Questions

I've admired Hoosier Cabinets for a loooong time, so I was pretty excited to find this at a "junk" shop recently. It's in pieces here, because I'm trying to clean it. But I have questions and would love to hear from anyone who knows about Hoosier type cabinets. Obviously the top piece sits on this base. Stenciled on the back of both the base and the top hutch part is "NO 269 SILVER WHITE FORSYTHE. On the underside of the pullout worksurface is stamped "MAR 1939 PORCELIRON" The base has been painted at some point, but the bottom right metal drawer, and the shelves inside the open part are all intact. Now, here's the top, and here's my dilemma. I really intended to scrub this baby up, paint it at creamy white, and USE it in my house. But after some cleaning and stuff, I'm suspecting that this paint and stencil on the top is the original 1939 paint job. The stencil is so art deco looking, and it appears to have been sprayed on. It just seems like it would be a very un-cool thing to do to paint over this. I'm doing a bit of research before I do anything but wash it up more. The roll-up tambour door works fine, as does the flour sifter thing. The door on the left (with the handle on the top) tilts out, and then the whole box thing is metal lined. The housewives of the day dumped their flour in there, and then it was dispensed out of the sifter thing at the bottom by cranking the little handle.

I'd love your input, as I try to figure out whether to paint this or not. Apart from being absolutely filthy it is in good shape - all drawers work fine. Except for the tambour door handle, which is metal, the other knobs are ugly black plastic.

this is a close up of the top part, to show the stencilling.

Look at this filthy water! This was after just an initial wiping down. The entire thing needs to be scrubbed with a toothbrush. But I LOVE it. Please, if you know anything about these cabinets, leave me a comment here. I don't even know the manufacturer. There were several companies, not just Hoosier, who made these. From the little research I did on the web last night I think it may be a Sellers brand, but I really don't know. Looking forward to hearing from someone who knows about this stuff. Thanks!