Only thing i know about the symbol you hold is that it was first a symbol of "friendship" for Native American Indians. Im not saying that is what you are holding(we all know Indians did not have items of that detail) I am just giving alittle knowledge away, http://www.aaanativearts.com/article376.html
I am not correcting you Mackaydon I am just adding to the history of the "friendship" symbol.
I just noticed this post. Sorry Mentalfloss. I think this is more likely a special forces. I have an Army button with C22 on the back. I say green check.