A whole lot of decorative sword knots to look at and browse from there.
http://images.search.yahoo.com/search/images;_ylt=A0LEV15hSgFTzEAAax1XNyoA?p=Knots+and+Portepee&fr=chr-greentree_ff&fr2=piv-web
SS
Here is the sword knot from my officers sword. I purchased the sword in 1965 upon completion of OCS. THe sword was a major expense at the time. I think I wore it a total of 5 times in 3 1/2 years.
Practical & decorative knot
http://youtu.be/mVCPIytjlwM?t=2m30s
A knot or not a knot?
http://www.unistorelondon.com/sword-knot-leather-brownjapanese-nco-army--r321-1659-p.asp
It looks incised or cut out.
As a former grunt, I reckon 5 times in 3.5 years represents a good return on the investment. You would have looked as flash as a rat with a gold tooth while wearing it. And you got to keep the sword!