The The NSDAP membership badge with the RZM code M1/129 is a well-known piece among collectors and is attributed to the manufacturer Seiler & Comp. from Geldern (RZM – Reichszeugmeisterei). A rarer maker.with the RZM code M1/129 is a well-known piece among collectors and is attributed to the manufacturer Seiler & Comp. from Geldern (RZM – Reichszeugmeisterei). A rarer maker.