Antique Simmons Hardware Co. "Royal" Rim Lock - Circa 1903 Steampunk Gothic Deco

This is an antique "Royal" upright ornamental rim lock by Simmons Hardware Co. with original Etruscan Bronzed finish. This lock is shown in the 1903 Simmons Hardware catalog. It is missing the original key and the keeper. The original finish is in good condition. Measurements: 3.25" x 4.875" A rim lock is a lock which can be used on both interior and exterior doors. Rim locks were in use prior to the development of the mortise lock. Rim locks are mounted on the surface of the interior of the door. Rim locks commonly include a doorknob hub, through which a doorknob spindle is installed and doorknobs are mounted on each side and secured into place with pins or set screws; and a sometimes a keyhole which accommodates an old-fashioned bit or skeleton key which in turn throws the deadbolt to lock and unlock the door. Rim locks have specific dimensions including backset, the measurement from the edge of the lock to the center of the doorknob hub; and spacing, the measurement from the center of the doorknob hub to the center of the hub for the thumbturn. The dimensions were not standardized in the 18th and 19th centuries so it is important to note the dimensions of your door prior to purchasing a rim lock.