I recommend the April 1929 issue. I found this in an antique store 10+ years ago, and it has (at least) two articles of interest: The main one is "Einstein's T

I recommend the April 1929 issue. I found this in an antique store 10+ years ago, and it has (at least) two articles of interest: The main one is "Einstein's Topsy-Turvy world", complete with picture of the 50-year old Einstein with dark hair. It talks about his "Unified Field Theory" book, attempting to explain it to a 1920's lay audience. It includes an artist's rendition of the 4th dimension. I also found interesting an article about someone learning to fly. This is 26 years after the Wright brothers and aviation is still young.