As mentioned previously, the "lazy s" marking is a combination of a D and a G if you look at it sideways. I've got a few of them pictured in a thread a little farther down titled Detroit Gasket cut down scabbards. I've kept an eye out and found some examples both crimped and reused tabs on the throat. The early cut downs had tabs break when reusing, so they started crimping the throats on. 

He sounds like a great man who went through incredible experiences.   R.I.P.

You do see a wide range of fabrics used, as mentioned they were private purchase items, so usually a higher grade of wool was used and a virtual rainbow of OD green. I would get a visor hat, but a nice overseas hat with officer rank would be good too. and not to toot my own horn, but Toot!  we do have a visor cap available: https://militarycollectorshq.com/store-catalog/ols/products/wwi-us-army-officers-visor-hat-item-4283

Tom,   You are most welcome.   Best regards   Leigh 

Whoops, I forgot I should've added some photos for reference.   https://imgur.com/a/IOga3pc Perhaps I'm overthinking?

Oliver Herbert berg served in the 91st infantry division and was a radio operator in the field.    edward C bell served in pattons 3rd army but no info on what division he served in.   john mark Martin served in Hastings naval ammunition depot in Nebraska and was 2nd in command there.   maybe this will help?

Donna Wosk is a member here (woskmilitary), I think she said they closed shop in 1945. But I'd think "close enough" if it were me!

Curious if this Ryan Aircraft pin can be dated by the card it is attached to. The item isn't mine, but an image I pulled from ebay (only image offered by the seller) and thought it 'might' go nicely with a Ryan Aircraft ashtray from 1953 I have in my collection if the time period is close. 

Leigh,   Thanks   Your post answered a multitude of questions.   Tom