I was looking at vintage ads for Life magazine, and found a sexist ad ... against men that is:http://www.pinterest.com/pin/119134352613887218/
Life Magazine, September 1956. Ad for Arrow Shirts. "A woman's most important accessory is a well dressed man."
Feminists have put up lists of vintage "sexist" ads against women, and a few of them may be, but it seems to be cherry picking from the vast majority that weren't or that even portrayed women (and men) in a positive light.