Interesting how Hajime went over how the steel rivets & pocket come together in the [wartime] sewing production line environment. One notable feature w/c was good to know was, there was no bartack reinforcement, w/c usually occur at the beginning of attaching the back pocket flap ... before rivets installation. ‘Got a question about the WW2 painted broken arcs.  I noticed variants in repro arc shapes & colors through the years.  Was there any particular [official] WW2 painted arcuat