Vintage 1980’s men’s leather book/mail/ messenger bag

Beautiful vintage men’s book/mail/messenger bag. I’m guessing it’s 1980’s maybe older. I’ve tried to find what brand it could be with no luck. It’s in great condition considering it’s age. Leather outside with cowhide inside. Latch on front scratched up but in working condition. I’ve enjoyed it for years but ready to let someone else enjoy it. Vintage Mail bag Leather Messenger bag Book bag