The shirt is the 1964 pattern 3rd pattern fatigue shirt used till late 60 early 70's ,The fatigue shirt/jacket was first issued in 1952 it was modified during its production by lifting up the top button to expose less of the white t shirt under it etc (if you want full spec just ask) . The order of the bayonet has a couple of tails to it's origin . After the Korean war the 7th infantry did border patrol which resulted in contact with enemy under normal condition such actions would merit the combat infantry badge but as this was a policing action the combat infantryman's badge was refused so the order of the bayonet was awarded in its place it is completely unofficial award. The 2nd tail is that it was during the Vietnam war that the 7th was still in Korea was doing patrol which ended in contact with enemy as it was still a policing action no award of CIB was aloud this was given in stead it was quite often seen in the 31st regiments units as elements of the 7th had been sent to Vietnam and were earning the CIB so it go's hope this help's
I have 2 metal ones. one is newer, possibly 60's era, the other is on a Korean War era ike jacket. The 7th was called the Bayonet Division during and after Korea un-officially a vet told me once. I'll look for pictures of the badges.
_________________ If i'm the stupid one, why do they have a book with pictures of the militaria and I have the real things??