Lot of eight old issues of Science &Mechanics and Popular Mechanics magazines as shown, most early 1950s, one from 1949. Space age vintage!
These have been stored in a man cave garage for many years now, and they smell musty. They're smooth and flat, no water damage visible, pages largely clean of foxing though covers have some soil.
I haven't tried any 'tricks' to clean these up (never stored in cat litter, or sprayed with anything - which I think smells worse than musty old paper!) They're not mint condition copies in any case (though I believe all are complete), but the articles and ads are interesting and fun. And the best part is the pulp novel style cover art!