I am unsure of the first one but I do not think that it is Heer.
The second shoulder board is a sewn in board for a waffenrock for an oberfeldwebel from Infantry Regiment 37. Nicely toned silver tress in the diamond pattern.
The third shoulder board is a Heer slip on board for the field uniform for a stabsfeldwebel . The Tress is a Reichsheer/Luftwaffe cotton type and was not factory or tailor sewn. He is an infantryman.
The first is possibly a Forrestry officer while the other two are Heer Infantry NCO straps, the center one an Oberfeldwebel in the 37th Regiment and the right a Stabsfeldwebel of Infantry.
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