I was going through the crawlspace today because we are having pipes put in and of course I had to go and volunteer to clean it out. Anyways during my expedition I came across this the markings as you can see say U.S. There is a pocket in the back and the main pocket on the front under the flap has another sub pocket in it. There is also one on the side as well. It looks to be that it was worn on the back judging by the straps though that is just my assumption. On the other bag I have it says Service Mask so I know what it was used for. This however has no marking aside from U.S. on it. I was just curious as to what this pack functioned for? Was it just a pack to carry misc. things or did it carry something like it was designed for it? Anyone know any insight I would appreciate it. Thank you. Here are some images of it.
Front:
Back:
Inside: