One of the classic vintage styles is Fair Isle. My dear mum is willing to take on the challenge. These are all from Susan Crawford's A Stitch in Time.
Notice they are all twinsets!! And of course, I must include my beloved reindeer top. Because I ask for it every year and I STILL HAVEN'T GOT IT!!!
(I'd normally include more about the history of Fair Isle and some 1940s examples but I'm blogging from my phone at the moment so that's why the posts are so short.)