These tiniest of percussion derringers are very popular with collectors. This one was manufactured around the 1860s, likely by Slotter & Co. The barrel has seven-groove rifling, a German silver blade front sight, notch rear sight on the tang, "N. CURRY & BRO./SAN FRANCO CALA/AGENTS" marked on top, and "DERINGER/PHILADA" and "P" marked on the German silver banded breech plug. The lock is marked "DERINGER/PHILADELA." There is some floral and scroll engraving. "8" is marked on the trigger guard tang, wedge, and likely on the inside of the lock and bottom of the barrel.