Vintage 70s gold, bronze and copper hobo bag

I bought this bag at an estate sale a few years ago and have never used it. Feels like leather, but there isn’t a tag listing the material. Interior is fabric. Zip closure at the top, small zip pocket on the inside, and exterior zip pocket that is 6” x 12”. Strap 32” Length 12” Width 12” All measurements are based on a stiff measuring tape, so they are close approximations. The bag is absolutely gorgeous and in great condition. It vintage, so it shows signs of wear—wrinkling in the leather, minor scratches on the hardware, arm strap a bit wrinkled too, interior fabric has some very minor spots. I tried to show the condition in the photos.