Hi Jim,
the 'hexagram' has many symbolic uses in many religions including paganism.
http://en.wikipedia.org/wiki/Hexagram
Also on this link is this interesting comment
"......A six-point interlocking triangles has been used for thousands of years as an indication a sword was made, and "proved," in the Damascus area of the Middle East. Still today, it is a required "proved" mark on all official UK and U.S. military swords though the blades themselves no longer come from the Middle East......."
So perhaps the 'Mason' connection is unfounded, I am trying to find more references to the use of the hexagram as a proof mark on early swords, if I find any I will add them here.
Regards David