The Edmunds 5560-D is a popular vintage solid maple, full-size quilting frame with an adjustable stand, allowing it to adjust from baby to full quilt sizes (around 24" x 45" to 24" x 90") with tilting and height adjustments for comfortable quilting. Key features include sturdy maple hardwood construction, detachable rods for storage, lever locks to keep fabric taut, and compatibility with optional extension kits (like the 5561-D) for larger quilts, making it a classic, sturdy, and functional frame. 
This was only used a few times back in 1985 and then put back into the original box and has been in a closet for the last 40 years. Includes all parts. I just assembled it today and included pictures of the real rack.
Key Features & Specifications:
How it Works (General Use):
  1. Assembly: Requires assembly, with instructions typically included.
  2. Attach Fabric: Fabric is attached to the quilting rods using cloth strips and tacks or staples.
  3. Load Frame: Rods are inserted into the frame, and knobs are tightened to hold the fabric taut.
  4. Adjust: Use large knobs to adjust the frame's height and angle for your comfort.
  5. Storage: Loosen knobs and detach rods to fold the frame for storage. 
Why People Like It:

If you are interested in the extension for this frame, I also have it listed on ebay https://www.ebay.com/itm/116989510602