The frame and screw on barrels are brass with the remaining surfaces iron. The frame is border engraved and marked "THOMAS" in an oval wreath on the left side and a floral engraving is present on the right side. Each barrel is numbered on the left side with the corresponding number on the breech plug. The top barrel has the number "4" and the lower barrel has the number "3". Two proofs are located on the underside of the breech plug. Vent tube valve mechanism on the left side of frame, manufactured without sights, and hammer safety. A floral blossom is engraved on the trigger guard and on the right side of the vent tube value mechanism. Fitted with a one piece smooth walnut grip.