The SS-Freiwilligen-Standarte Nordwest was split into SS-Freiwilligen-Verband Flandern and SS-Freiwilligen-Verband Nederland in July 1941.

Commander

SS-Oberführer Otto Reich (? Apr 1941 - ? July 1941)

Insignia

The "Nordwest" cuff title was authorized for this unit in June 1941.
A trifos  (three-legged swastika) collar tab was authorized in April 1941.

Legion-Obersturmführer Per Sørensen wearing the trifos collar tabs
wss-freikorps-danmark-sorensen-per
(Courtesy of Die Deutsche Wochenschau/Ivan)

Sources used

Christopher Ailsby - Hitler's Renegades: Foreign nationals in the service of the Third Reich
John R. Angolia - Cloth insignia of the SS
Kurt Mehner - Die Waffen-SS und Polizei 1939-1945
Gordon Williamson & Thomas McGuirl - German military cuffbands 1784-present

Reference material on this unit

- None known at this time -