New Subscriber here needs help

Hello all,
I am a new subscriber that just joined. I have been collecting primarily Olympic stuff for the last 40 years. I generally do it By buying collections for the 2 or three items I really want and put the other stuff in boxes. Anyway, it is time to start cleaning stuff out and I ran across this stuff and I have more. (It was from a lot I was collecting on Jesse Owens and is primarily from the 30's-50's and WW2). My family is heavy military so I was thinking of starting collecting Military Items for my son (He is a Major and Pilot in the US Air Force, My father was in the Navy both WW2 and Korean War and documented as being in the first Wave ashore at Iwo Jima and is buried at Calverton National Cemetary and my grandfather was in WW1 and WW2 in the US Army). All that being said The Jesse Owens stuff was verified and Authenticated and I would like to figure out if these items are real of reproduction and what their worth is.

My Questions
1. Is there a way to tell if real or fake?
2. Which ones are Valuable and I see stuff on ebay going for 5.00 and 2000..
3. I know with Autographs and Sports cards there is PSA/DNA and James Spence as the standard for Authentication, Which Company is the gold standard in the Military Items word?

Any Help appreciated.Attachment 1572522Attachment 1572522