As to the blue covers, I think they are a publish-WW1 thing, and found while in the Mike Chappell illustrations as A number of reenactors make use of them, and he at times gets them to pose for Image's to foundation his https://alyssayrnp149803.post-blogs.com/49851555/an-unbiased-view-of-magenta-overlap-tank-top-and-flare-pants