I could swear I saw an actual piece using the Egyptian coil "chain,"
which is definitely more than a just a spiral, in a book on Ancient
Egyptian artifacts that I found in one of the local libraries.
Unfortunately, I use a lot of different libraries and have probably
borrowed every book remotely related to ancient jewelry, so I doubt
I'll be able to trace it. And a lot of the books are out off print.
However, two suggestions: contact the Egyptology dept. at the
University of Chicago. Surely someone there would know.
And...Dawn Hale has posted to this list--she's the woman who works
with the Met Museum making those gorgeous PMC pieces. I can't find
her email address in the archives, but I would bet her contact at the
Met could answer this question.
Dawn, are you reading this?