Rank insignia of the Nazi-Wehrmacht, Heer (Army), here shoulder board, used during World War, until 1945:
Fahnenjunker-Unterfeldwebel, short: Fhj-Uffz, Fj-U (as to Unteroffizier, additional two 9mm silver-grey diamond-woven rayon NCO braids close to the end of the shoulder board)
corps colour – Bordeaux red – of the „Chemical troops“
today comparable: to NATO OR-5b.