Vintage Bell System Logo Made in USA Nubuck Suede Attache Bag Briefcase Work Bag

The bag is pre-owned and has some light cosmetic wear from use/age. There isn't a materials tag, but it seems to be made from a rough textured nubuck type of material. There's some writing on the inside near the handle (photo 10). Please look at all of the photos and ask any questions before buying. Thank you!