During late May 1941, free postal privileges for mail weighing up to 250gms, were given to Belgian nationals while serving in the German armed forces. A fee of 3 Francs was charged in Belgium for mail weighing 250 to 1000gms. A 20Rpf for mail posted by Germans nationals.

On 23 December 1941, the Brussels firm of De Reume printed four miniature souvenir sheets with four labels each, shown above. Each label shows a symbolic propaganda representation between the medieval Flemish Knights and the Legionnaires. Each label also bears the Legion emblem with the inscription reading "Volunteer Legion Flanders/Military Mail/Eastern Front/1941." The labels have a surtax value of 50 Francs each. The proceeds were used to benefit the Legionnaires or family members. A total of 30,000 sets was issued.

Here a complete set in mint condition. Very rare. The 50 Francs sheet with authentication stamp in blue:”EXPERTISE A. WAROOUIERS”.