Google Images has hit a home run! They have brought online the entire database of photographic images from Life Magazine. For those of you who are too young to remember Life Magazine, just take my word for the fact that other than National Geographic Magazine, you will not find finer photographic images. This database reaches back through history to the 1860's! Although the search page claims the images stop with the 1970's, the database is actually "Time Life" and reaches to current history. I still need to spend some more time testing, but here are some examples of covers from Time Magazine (run my query and just replace the year for your own desired results):
Here are two covers I found from Time (circa 1941), and a multiple frame photo of the Saturn V rocket. Click to expand any image to full size. Search for your own Time Life Magazine images.