15 Francs, 1943, SS Field Post, Volunteer Associations of the Flemish Legion, Maria Theresa portrait, black-brown / dark chrome yellow, small sheet of 4 stamps without numerator on the right side, as issued, mint never hinged, flawless condition, a rare perforation error with double perforation between the 1st and 2nd stamp, and between the 3rd and 4th stamp, as well as manufacturing-related color adhesion on the gum of the right-hand stamp, unsigned, Michel 200.-