Morten St George Theory

[Morten St. George]

I hope people don't think from your post that I was definitely saying it says "S A L". That's only what it appears to resemble. It might mean salt, or it might be initials for something, or it might be something else (other people have proposed credible alternate readings).

I only wish my computer had sufficient resolution for me to see it for myself but, regardless, salt makes sense for something that looks like a cube or box.