On the IMDB goofs page someone mentioned that
“Barnes’s helmet band has two sewn-on reflective patches. These “cat’s eyes” were only adopted much later in the 1980s.”
Cannot find anything confirming the statement, but Barnes has the ONLY one band with patches. Maybe it’s a symbolic hint that Barnes “has eyes on the back of his head”? 🙂 Being me, I forgot the year, then I started asking myself if it could have something to do with the word TELLEZ on it. A souvenir of a Vietnam Vet? There is one Marine with this name listed on The Wall, but — of course — if they haven’t got those “eyes” before 1980s it couldn’t be from Vietnam…