SMITH & WESSON SMALL FRAME VOLCANIC PISTOL. SN D18. Cal. 31. 4-1/8" part oct bbl. marked "SMITH & WESSON / NORWICH. CT." on the top flat of the bbl. "PATENT / FEB. 14. 1854" on the left flat and "CAST-STEEL" on the right flat. The frame has the typical large...