Steven,
The early version of
Urumi-shaped sword often appears on ancient (8000-1000 BC) Babylonian and Mesopotamian (Sumerian) stamp cylinders/rolls, which were used just like modern stamps to make impressions on clay tablets.
Originally it was of a solid, not flexible/coiled type, and it is quite possible that later on the same shape was adopted and modified in Asia and/or India.
http://www.britannica.com/eb/art-512...rticleTypeId=1
http://www.metmuseum.org/toah/ho/02/...41.160.192.htm
Good luck with your project.