This is a medium-sized bag from BEMIS BRO BAG CO, estimated to be from 1945, a company established in Wisconsin in 1858. There are no markings like mil-spec, so the details are unknown, but it's very sturdy and has a large gusset, making it a high-capacity bag. What it was used for is unknown. It would look great attached to the side of a motorcycle for carrying luggage, or for camping. How about it if you're interested? No claims, no returns. Thank you for looking.