MATCHED COLT LORD & LADY FOURTH MODEL DERINGER SET WITH CONSECUTIVE SERIAL NUMBERS The firearm with serial number 65558D is a Colt Fourth Model Deringer chambered in .22 Short. Key Details: * Model: Colt 4th Model Deringer (single-shot, top-break style modeled after the historic Thuer Deringer) * Caliber: .22 Short * Serial Number Suffix ('D'): Indicates it belongs to the production era spanning roughly 1959 to 1963 (First Series with a "D" or "N" suffix). * Barrel / Frame: Features a pivoting 2-inch barrel and a plated Zamak (zinc alloy) frame with matching barrel finish (either nickel, gold-plated, or black oxide "Du-Lite"). * Firing vs. Non-Firing: Most of these were functional single-shot handguns, though some decorative/non-firing versions were manufactured for presentation cases, books, or desk ornaments (which typically lack a barrel notch for the hammer).