Check the listing for details. Antique No. 6 Warded Skeleton Key - Solid Barrel Replacement. Condition: Used. Listed at 19.95 USD. This is an authentic vintage warded skeleton key, likely from the early to mid-20th century. Unlike branded keys, this piece features a stamped "6" on the bow, which served as a universal identifier for homeowners to find matching replacements at local hardware stores. Design: Features a classic oval open bow and a solid steel barrel. Mechanism: The notched bit is designed for a warded mortise lock, common in residential interior doors of Victorian and Craftsman-era homes. Condition: Shows a natural aged patina consistent with historical hardware used for room entries or original cabinet locks.