well I've woken up this morning still thinking this is very odd, and still wondering about a plausible explanation.
Spy, you're the one who underestands the symbolism, what's the precise meaning of this icon if used by a mason in context with other masons. I'm not asking you to speculate again about this particlular instance, but within masonry, how would this be interpreted? Is there any difference between the eye on top of the triangle/pyramid and the eye inside it? Do the rays at the top add anything specific?