These are the Mobius quilts Amy Szczepanski showed in her
Click on an image to get a higher-resolution version of the
Amy Szczepanski's six-colored Mobius band
another view of the magnificently six-colored Mobius band
Amy Szczepanski's zippered-in-thirds Mobius strip
Amy Szczepanski's mysteriously-constructed Mobius band (can you find the horizontal seam?)
...so look, the part on the left is folded over, and that side has a seam, but the right-hand side doesn't... hmm....
Amy Szczepanski's zippered-up-the-middle Mobius strip
More of the Mobius band quilt
one side of the edge is purple, the other red; the hand rotates as it traverses the strip for easy comparability here
Here you can see the hand rotation in action...