This remarkable 18th-century French serrure de maîtrise, or master's lock, represents an extraordinary example of technical artistry from the golden age of French locksmithing. Ingeniously crafted with a visible mechanism, this intricate demonstration piece was likely employed by master safemakers to showcase the complexity and reliability of their locking systems to prospective clients. Fashioned from rolled, cut and engraved wrought iron, this exceptional lock features dual deadbolts and a str