SA (Sturmabteilung) Belt Buckle (Koppelschloß). The SA (Sturmabteilung) was originally formed in August 1921 as a protective guard unit for the political leaders of the NSDAP. The SA pattern box buckle was the first belt buckle to be introduced by the NSDAP. This is an early two-piece brass construction buckle. The buckle is not visible maker marked. The buckle comes with its original wrapping paper. Stunning original belt buckle in mint and unissued condition!