Strange Adventures #240 from February 1973. That's the last of the Strange Adventures archive of spacemen covers and what have we learnt? Well regardless of whats going on around them in the real world or what innovative design is being cooked up in the movies, your average comic artist is perpetually drawn to a the classic fishbowl style of space helmet simply because it allows him to illustrate the human face and its many expressions. Although I'm not entirely sure which one this is meant to be.
Name checking of the artist in the comments below by Mister Snitch! Many thanks, Sir.