Germany Third Reich Badge RKB (1940). (Reich Colonial League) Membership Badge. A third reich German RKB (Reichskolonialbund/Reich Colonial League) membership badge; in silvered bronze and black; white; and textured red enamels; vertical pinback; maker marked 'S' and marked 'Ges. Gesch. on the reverse. Silvered bronze. Weight approx: 2.47 g. Diameter: 20x13 mm