I've also gotten a couple small batches of pre-war Astoundings; this isn't all the covers but it's some highlights:
Part 1 of "Gray Lensman:", the cover is the only place they use the Grey spelling:
This one was mislabeled, but I'm OK with it: It's actually the British edition. Still want to get the US version, but it's an interesting point of comparison:
Just a striking cover image, the issue has part 1 of "Slan"
Part 2 of "Slan", but the best known story in this issue is "Farewell to the Master". If that doesn't sound familiar, they renamed it "The Day the Earth Stood Still" when they made it a movie.
And Heinlein reaches the point where he's writing so much he needs to start using a second name, in just 10 months he has 8 standalone stories, 2 3-part serials, and 3 names: