Posted the rest here https://www.worldmilitariaforum.com/forums/index.php?/topic/323882-soviet-and-moldova-shoulder-boards-and-patch-identification/ If anyone can help that would be great. 

To be specific I’m talking about the army air corps cadet slate grey uniform and the items worn with it. If anyone has the regs for it I would greatly appreciate it

Not sure if this string is active but I have a yellow/green version of the hat but cannot find the drawing number stamp on the yellow brim area. Since I can't locate that can I say for sure that this was a WWIi production hat? And, unfortunately my hat does hot have the adjustable band - how much does this affect the value? Thanks.

old thread on possible use of surplus vests in WWII, from forums   "Saw this photo in a recent gun book of the invasion of Okinawa April 1st 1945 of a Marine with his model 12 trench shot gun & WWI / USMC grenade vest used as a shotgun shell vest which the topic was addressed here before but questioned very neat"    

Thank you very much! Re thread colour - here’s a different lighting situation.

I think it is a solid categorization, though a bit complex it hits all the points. Maybe revise the original for higher end items and have a more basic one for regular more “attainable” items (if you have the time at least 😉). You did a great job summing it and yo and was glad to come upon this thread.

You're welcome.  I agree, a great history and story to go along with the cap.  

The standard officer's cap device was typically made of brass with a silver colored finish.  The "clouds and lightning" motif on the visor is made of silver bullion wire. 

Here is one topic on the forum for the shotgun pouches. The last page shows a Rubon made pouch   https://www.usmilitariaforum.com/forums/index.php?/topic/13593-lets-see-your-us-shotgun-shell-ammunition-pouches/

RUBON KC (Kansas CIty)    They also made Carbine pouches during WW2    The thread looks a bit thin for the sewing. Maybe its just the light or photo