Reichsluftschutzbund (RLB) zinc-based door-plaque ('Türplakette'). The piece has an approximate diameter of: 7 cms. and is constructed from silver- (ie. black-) painted zinc. It shows the 'RLB'-symbol surrounded with the text: 'Reichsluftschutzbund' and: 'Mitglied' (= member). The piece was never mounted and comes in a virtually mint condition.