German WW2 RDK Reichsbund der Kinderreichen membership badge

This authentic German WW2 membership badge was issued for the Reichsbund der Kinderreichen, the Reich's Union of Large Families. Made from die-cast metal with a silver finish and red and blue enamel, it features an eagle protecting its young on a red background, surrounded by a blue ring with RDK at the top and a swastika and leaf emblem at the base, plus "Ges. Gesch" and maker's mark "A.K." on the reverse. Measuring approximately 25 mm across with its original pin intact, it is in good condition for its age and offers strong provenance as a historical collectible.