This little treasure was recently found in and rescued from my grandfather's basement. It the model 12 Sunbeam Mixmaster and it still works.
The model 12 Sunbeam Mixmaster was made between 1957 and 1967 and was the first to feature 12 speeds.
It was available in chrome, turquoise, yellow, pink and white and is the last of the classic model Sunbeam Mixmaster mixers.
A more modern model of a Sunbeam Mixmaster is actually part of the Smithsonian's National Design Museum permanent collection. And the current Sunbeam Mixmaster mixer would fit pretty well in any mid-century modern kitchen.