Hartmann Vintage Shoulder Bag, Tote, Briefcase, Messenger

Olive green pack cloth nylon with leather or vinyl accents (I'm not sure which). Measures about 16 x 12.5 x 7 One main compartment about 5 inches wide, one smaller zippered compartment about 2 inches wide, and on the front is a flap pocket with the brass clasp (no key included but it isn't locked). On the back side is a slip pocket, with a small zippered pocket on the face of it. Please note that it does not have any handles, it is purely a shoulder bag. I am including a basic shoulder strap, but it is not a Hartmann strap, and you will have to figure out how to connect - see the pictures for details. Perhaps a double-sided snap hook, or brass colored carabiner: https://www.amazon.com/dp/B0BSC2VJTL https://www.amazon.com/dp/B0876M55YP?th=1&psc=1 In great condition for its age (1980's?). There is a small abrasion on the back side which is visible in the photos, and also some hazy spotting on some of the interior. I tried to clean the spotting with Nikwax Tech Wash but it made no difference. I think it is the polyurethane coating starting to discolor.