We've all seen these.  They look like the cords you see on sword bags.  Many appear to be WWII era.  This one from some email correspondence with @Bob M. (if I got the right guy!?).  It's a much smaller cord and appears to have been woven or stitched on.  If we can get some close-ups shots to show it, I'll update.  Or Bob can if he's following this.