I have seen episode 3 and the first half of episode 4. I also have rechecked my recordings in slo-mo, mainly from episode 1.
Pic 1 showing other boys in brown buckskin Lederhosen. Same 2 vertical zippers.
The walking scene of pic 2 (episode 1 ?) showing clearly that the fabric is very thin. I’m still unsure if it’s leather. To me, leather and nappa are not that thin. But there are drawstrings beneath. The fabric is also shiny, so could be PVC. But probably we will never know for sure. I don’t like too thin fabric but it also has some advantages.
In episode 3 they have much longer hair (although in 1974 as well). Rather few good scenes.
Episode 4 is much worse. 5 years older and probably no Lederhosen. And the kid in overalls at the beginning is a girl and not a boy (see my other blog).