"My great grandpa, an Iowa native and WW2 veteran, passed away and left behind this tool or decorative piece. It is solid metal, has no markings, and weighs a few ounces. Screwdriver is for scale."
A: "I think your grandfather might have known someone in the Navy. Those are used in a ceremony when crossing over the equator. So I think your grandfather is what you refer to as a shellback. That is someone who’s been over the equator."
Same thought here....i realize I am old :-(