Paul:
As you know, info is kind of sketchy for Dormeyers, but I think this styling dates from around 1957-58 or so.
As you also know, the Mix-Maid was essentially a Dormey with a base and bowls - the entry-level stand mixer. Since it was Dormeyer-built, it actually worked decently well; other manufacturers' BOL machines could be pretty hinky.
I have a higher opinion of Dormeyer's MOL and BOL machines than our dear friend Kelly mixfinder had; he didn't like the Mixwell/Princess machines at ALL - though it was he who sent me my Princess when he found it, because he knew I wanted one. That Princess has never let me down, and it's perfect except for some rust on the chrome turntable.