Those loops of ribbon on the sides.....

[sydnie7]

[snip]
3. I count four kilts. Some XMarkers feel funny if they don't have a different one for every day of the month!

And two in what looks suspiciously like the same tartan?

Why do you suppose one, and only one, of the sets of loops have knots tied in them? To make them all the same length? Oh, the questions we will never have answered. . .

Cool photo, thanks.