Vintage 1940s "Astounding Science Fiction" pulp science fiction magazine. This is the issue from June, 1948. The cover story for this issue is "Dreadful Sanctuary" by Eric Frank Russell. There are also stories by Isaac Asimov, Judith Merril and others.
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 also a small number "0" stamp applied to the middle of the top of the cover. There is a "6 8" in ink on the bottom edge of the pages.