Have a Dwight Schuh Frame Backpack that is in Very good condition. It has been used 1 time and was kept in its original box in storage ever since. Each bag can be removed from the frame to be used as a standalone backpack and fanny pack respectively. The clips for the for the fanny pack are missing though. Probably can pick them up for a couple dollars at True Value or similar store though. 

The frame features padded backpack straps and padded waist belt for comfort. It uses "Lash Tabs" to allow you to mount loads in a variety of ways. The larger bag is a large and has a pull strap type closure at the top with the fold down top secured with the clip. The fold down top does have a zippered pocket. The fanny pack portion is zippered with a zippered internal pocket. 

I have more pictures if you are interested.