Late 70s to mid 90s are my favorite vintage bags. Totally cool. Check pockets at the bottom for wear. Check for rust. If you see water around the bag from a hose in the picture it's not good. The metal tabs at the base should be rust free. Dirt is ok but scuffs thru the finish of leather, vinyl is bad. Here is a pic of some of mine. The one in the middle is Robert Mendralla's personal staff bag. That's a collectable.