Neat! A rollover cutoff switch might also be a good idea. I like how it has a light bulb on it to make it look like it's working lol.
If I had to venture a guess, I'd say just post-war, maybe pre-war. Still a bit too art-deco to be up into the 1950s.
You know you can buy all the thermal fuses you want from places like Digi-key or Mouser. I just got a couple recently for an attic fan motor that'd burned its fuse.