NSDAP Party Membership badge, early pre-RZM version. Manufactured in bronze with red/white and black enamel, the red enamel typically translucent over a stippled base. Reverse with 'Ges Gesch' designation. This is the scarce 18mm version. The full-size version being 23mm.

Note: Party badges without the RZM designation were typically manufactured throughout the 1920s and beginning of the 1930s. Typically from the so-called 'Kampfzeit' period.