Now that 'retro' and 'vintage' is an seemingly all-encompassing thing now, it can be tricky finding something that's simple and actually captures that 'timelss' look from years gone by. However, rummage amongst the loud 80s patterns and ironic t-shirt slogans and there's still a load of gems to be had.
Take this simple (but effective) polka dot pencil skirt for example. It will go with just about everything you own and can be paired up with a '50s wardrobe just as much as it could sit with '60s mod clobber. At £22, it'd be rude not to.