Does the bag or any of the bottles or other contents have a FSN or NSN. would be like ####-00-##### or similar? If I recall correctly everything had a FSN on it. Might be able to look up the FSN to help date it.
yes they did use both types of snaps..and a couple of other types of fasteners...
but..this one has both snaps shown...it is the color and weave of that bag that has me
The Benzedrine was used into the early fifties. My dad used them in the Korean War. But I am thinking that if they were US issued medicines they would have more markings stating such. The bag looks military only in constuction. Genuine US gear was ink stamped with "US' and other identifiers.