After some research I'm guessing CPT J.D. Johnson is now Lt. General J.D. Johnson who in 1977 took command of EUSA. Here's some info because the photos aren't very clear.
It's a rear seam Swivel Bail heat stamped 1264H. And I looked up the brass plate markings to find the following.
United Nations Command - UNC
Eighth Uinted States Army - EUSA
U.S Army Aviation School Motto - "ABOVE THE BEST"
And all I could find regarding ABN GAWEDA was some info on a Command Sgt Major Gaweda, any thoughts?
Brass plate says -
CPT J.D. JOHNSON
CO UNC EUSA HONOR GUARD
"ABOVE THE BEST"
FROM (ABN) GAWEDA