.45 teat fire caliber revolver with 7.5" barrel and 6-shot cylinder. Blued or silver-plated with walnut grips. Barrel marked "National Arms Co. Brooklyn". Exact number made is unknown. Estimated fewer than 30. Too rare to value. Recent auction sales include a no-finish example sold for $3,250 in 2020, and a 40% blue example sold for $16,100 in 2018.