This is kind of backward but related to at least U.S. Navy tradition. i would keep it personally, like my military script from FFXI. though i might see if i could trade it to a NPC Chief or any NCO or enlisted NPC who salutes you.

Tradition is that all new officers are given or must acquire a silver dollar. You give the silver dollar to the first person who salutes you after receiving your commission. My ROTC MCPO had quite a collection of them, being as he was CMC for our NTC.