5/8″ LD-K-13 Knob — a heftily cast brass Londonderry knob that is an exact copy of a specific period original. Beautifully balanced for interior use, this reproduction captures every historical detail and surface texture of the source piece. Handmade from solid brass to authentic proportions, it’s one of the finest reproductions in the world for restoration, preservation, or high-end architectural projects. Each knob is cast to order to ensure museum-quality fidelity and finish; please allow roughly 4 weeks lead time for production and delivery (this is an estimate, not a guaranteed ship date). Perfect for period homes, historic restorations, and discerning homeowners who demand authentic, heirloom-quality hardware.