One variation is found here in Simplicity 3406 from 1940. The jacket is cropped, bolero-style, and the blouse is classically structured, with beautiful and feminine frills on both long and short puffy sleeves. The skirt has many gores for wonderful flare:
In contrast, another variation from Vogue in 1940 has a longer, more tailored jacket (with an option for traditional long sleeves), but still with those signature 3/4 sleeves, and a simpler, no-frills blouse with puffy sleeves (long and short). The skirt is similarly simpler, with fine flare and straight princess seams.
Each version has a lot going for it - I like them both, but for different reasons. Do you have a favorite?