Frogprince,
I've wondered about this for some time. Thanks for sharing that information and I bow to your expertise on all matters.
Don't know exactly how true this is, but found that even today the "Star Proof" mark is required on US and British military swords due to blade specifications. Some type of quality control I guess. I believe on modern blades, it's two triangles combined, rather than the two separate interlocking triangles.
I read somewhere and who knows, that the six pointed star was used by the Persians to signify that the blades were made of Damascus steel quality.
We can't rule out the significant use of this symbol by the British military in the past on many items. Just for example, not sure if actually in the shape of a Hexagram or not, but the British created eight campaign, six pointed star medals for WWII alone and the British Navy has used the six pointed star I believe on shoulder boards. I could be wrong on this. Also, the crown wanted the world to be British and the points of the star symbolize north, south, east, west, up and down. The combination of the two triangles symbolizes victory of good over evil. It was all for God and Crown back then.
Then again, it sure looks like the Star of David or "The Shield of David" (Hexagram) Two interlocking triangles. King David was a military hero and folk lore links this symbol to a magical shield supposedly owned by King David that protected him from his enemies. And again the combination of the two triangles is said to symbolize victory of good over evil.
Anyway, this symbol was used by a few cultures and religions for different reasons, mostly pagan I believe, but whatever the reason for the "Star Proof", it�s always fun to guess.