- I have seen the shape before..

Post a photo of the 're-stitch around a sloppy disk edge'.. And do you have a UV light? Ultraviolet light.. IF you do you can do a quick test to the white of the disc....

- How does it hang from the top? ,,is there a rope, loops , or is it 'sleeved' meaning you can slide a pole thru it for hanging.. If nothing is it stitched at top edge?