Vintage early 1950s, pulp science fiction magazine, "Astounding Science Fiction" from August, 1950. The cover story for this issue is "Last Enemy" by H. Beam Piper. The back cover is an advertisement for L. Ron Hubbard's Dianetics.
This is in nice vintage condition. We don't know anything about grading pulp magazines, but this issue does have light wear and age. There is a "8 0" in ink on the bottom edge of the pages.