U.S. Marine Corps Tie Clip
U.S. Marine Corps Tie Clip
U.S. Marine Corps tie clip made by Hickok U.S.A. (SER. 142)
I'm not sure when they changed to the gold ones that they use today, but here's a salty one from back when they still wore the black ones. The finish is well-worn, but the mechanics of it work just fine.
$8