Derringer .41 cal, 3-1/8 inch barrel, circa 1840s-1860s. Numbered on under side of barrel It appears to either be a "10" stamped over a "7" or possibly a poorly stamped 170. Silver inlays and german silver mountings fashioned very closely after those of Henry Deringer. Marking on frame and barrel "DERINGER/PHILADELA" which would make it consistent with the description of a Slotter & Co. Pocket Pistol. This firearm is antique and does not require special licensing. Processing and shipping within the Continental US $50 . All FedEx packages are sent with Direct Signature Required and insured at full replacement value for a fee of 1.5% of the purchase price, unless buyer accepts complete liability in writing. Discounts given on combined lot shipping. Overall excellent condition. Action functions mechanically. Bore clean, rifling distinct though not very deep cut.