Here are a few pages from a recent storyboard for McDonalds. A couple get in their car in a modern suburban street and as they drive to the McDonalds, their dress and environment change into a 1950s style. The McDonalds they end up at is the Des Plaines branch in Illinois, which was built in 1955; hence the ad is named ‘1955’.
You can see the complete storyboard here and the finished ad here. Each frame was drawn up in A4.