Unknown Ritterkreuzträger from Heer

Unknown Oberleutnant with two Hitlerjugend member during the training of map reading. The original caption is written: "Soldaten von morgen. In einem Wehrertüchtigungslager der HJ. Ein Ritterkreuzträger geht mit den Hitler-Jungen ins Gelände und erteilt Unterricht im Kartenlesen" (Tomorrow's soldiers. In a military training camp of the Hitler Youth,  Knight's Cross holder goes into the area with the Hitler boys and gives lessons in map reading). Some sources identified the Oberleutnant as Bernhard Klemz, but Klemz received the Ritterkreuz when he was a Hauptmann, while our mysterious guy is still an Oberleutnant but already got the medal.

Source :
Bundesarchiv Bild 146-2000-001-12
https://www.bild.bundesarchiv.de/dba/de/search/?yearfrom=1933&yearto=1945&query=Ritterkreuztr%C3%A4ger