Imperial German WWI Brass Bavarian In Treue Fest Belt Buckle Imperial Bavarian belt buckle superbly crafted and authentic down to the finest detail. Bavarian WWI belt buckle has been struck from dies created through copying originals in the IMA collection. Constructed of real Brass with "In Treue Fest (In True Faith) crest. Known as a field buckle or Koppelschloss. Worn with the standard German WWI leather field belt (sold separately).