It’s the way people dressed, the hairstyle, the mustaches. You associate certain styles today with a certain age because at one point people stop following the fashion and keep dressing the same and keep the same hairstyles. Then they get old and that is the style you would associate old people with today. If you gave him a contemporary haircut and shaved the mustache, he’d look like a regular 44 year old from today. …and yes, the smoking, the lead from car exhaust, and the lack of sunscreen contribute as well.