Hello Mark.  This is a Museum Reproduction Limited  (MRL) reproduction knife  Sheath shows rivets on the backside greatly different from authentic knives. Fittings are much cruder that originals.  I don't think these have the black spacers you expect to see on the original as well.

It may just be the lighting but to me there seems to be some signs of wear. The snaps on the top pockets kinda look like the spot on this bdu from the buttons. I have a m65 with the same thing but I could not get it to show up well in a picture. 

Here it is. In the third image you can see where I have left some of the original charcoal covered layer.

Could be one of many

Maybe it's not military? The only thing I could find using Google lens is a Japanese site selling them as us military bags. The description claims that it is for shotgun shells but I'm not sure if it is correct. I may be wrong but just a another guess is maybe it could be medical. Though it could be just a commercial bag, I've seen lots of different things that were made in China that were made in a ucp copy.

Curious to know what a value is for this grouping, Mollus medal to a USN Surgeon and his Son's grouping of medals. named and traceable

Great information, thanks! Back in the day Pan Am was quite something. 

Thanks!     Mark sends

Thank you for posting this information @patches. Do you know the maker of this DUI?

real or not