My "E. Witte, Trier" has a leather strap as well as a buckle that includes a leather frame, not metallic. The Gottlieb Hammesfahr catalog reveals the leather strap and metallic buckle was applied on their Verlangerungsmesser sheath. Unquestionably more of the collectable than a utility style of bowie knife, but https://bowieknife37740.blogolize.com/not-known-details-about-bowie-for-sale-67541216