Greg:
If you would like a "look" that will bridge your early 20th-Century house and your Mid-Century interest, I have a suggestion.
Postwar appliances, with their rounded edges and bulletproof construction, would be a good start. Either GE or Frigidaire major appliances from the late 1940s/early 1950s would be what I'm talking about; the Frigidaire appliances of that period have the advantage of having been styled by no less than Raymond Loewy.
Your tile countertops appear to be dark green in the photos (at least on my kerosine-burning computer's monitor, LOL). That was a popular counter colour in the postwar era.
Armstrong's Excelon floor tile is extremely similar in appearance to the vinyl-asbestos tile commonly seen in the postwar period (without the asbestos, naturally). My grandmother's kitchen had white Youngstown Kitchens metal cabinets, red Formica countertops with metal edging, and a checkerboard floor of black-and-white vinyl-asbestos tile. Her kitchen curtains were red-and-white checked gingham. I cannot remember the make of her stove, but the fridge was a rounded-top Philco. It was a great postwar look, a little bit country and a little bit '50s rock 'n roll. I do think you're headed more in a country direction, though. For your kitchen, there are several greens available in Excelon, to coordinate with your counters, or you could also do ceramic tile on the floor if your flooring joists are up to the load.
Also, I write for two magazines that may be a good resource for you; they are Old House Interiors and Arts & Crafts Interiors. Unlike most "old house" magazines, which stick strictly to foofy Victorian looks, these two will sometimes touch on the Deco and Mid-Century periods, and have shown some kitchens with postwar looks.
I notice that your walls are plywood. What's your plan for them?