As announced, I've re-uploaded larger pics of May 2011. But most of them are females (post coming soon). I have rechecked this movie (at high speed), made new caps and I think it's woth making a separate post. There are at least 2 scenes of bibs.
Pic 2 is new, where his mom inspecting his dirty bare feet and touching his back/butt. Bibs are quite simple but not hickory striped as assumed. Also kneeing down. He's also in a zinc bathtub with the bibs next to it. Scenes at ~33 and 39 minutes.
There's also a novel by Dalton Trumbo, but I haven't found descriptions of bibs there.
Main entry, rating 6
https://biboverallsfilms.blogspot.com/2011/05/johnny-got-his-gun-1971.html
https://biboverallsfilms.blogspot.com/2011/07/info-64-barefoot-movies-list.html
(I also have added the Waltons Barefoot list (from a lost 2015 comment from wordpress))
https://biboverallsfilms.blogspot.com/2011/01/the-waltons-season-3.html
https://biboverallsfilms.blogspot.com/2013/02/story-48-better-barefoot-or-boots-front.html
https://biboverallsfilms.blogspot.com/2015/10/story-103-webfinds-historical-farm-boys.html