Lot of 6 Science and Innovation 1920s-1930s Magazines

Lot of 6 good, vintage, softcover magazines; each magazine is clean and shows significant age-toning (see photos) and markings to the front covers (see photos); each magazine cover (wrap) shows significant shelf wear, including wear along the spines, age-toning, and wear along all edges and corners (see photos) but overall remain in good, vintage, condition; purchaser signature may be required upon delivery. B5