Officers from Nachtjagdgeschwader 1 (NJG 1) at Venlo

Officers from Nachtjagdgeschwader 1 (NJG 1) at Venlo, Holland, Spring 1941. FLTR: Nachtflugleiter Hauptmann G. Hitgen (Fluglotse a.k.a. air traffic controller), Hauptmann Werner Streib (Staffelkapitän 2./NJG 1), and Leutnant Hans-Dieter Frank (Flugzeugführer at 2./NJG 1). They're wearing ledermantel M1936

Source:
http://www.historicalwarmilitariaforum.com/topic/6937-ritterkreuztr%C3%A4ger-photos-in-color-thread/page-33