Vintage Belt Buckle 1970s Motocross Motorcycle Jumping Racing USA Made By Bergamot Brass Works. Normal wear and tear due to age and use. Bergamot Brass Works is an active manufacturer in Delavan, Wisconsin. ​ It was the first commercial maker of modern belt buckles to enter the market in the early 70s. Most of their early buckles featured a brass or pewter plating over a base metal, so not all Bergamot Brass Works belt buckles are made out of brass. They produced numerous retail designs in addition to corporate orders. Bergamot Brass Works also produced buckles for wholesale distributors including Siskiyou Buckle Co. and Arroyo Grande Buckle Co.