Measurements: Diameter 7.5 cm. Materials: Solid brass. Period: 19th century. This door knob is an example of prestigious architectural hardware, made entirely of solid brass using a thick sand casting technique. The element is distinguished by a rigorous octagonal configuration, characterized by sloping sides that converge with geometric precision towards a raised central umbo, finished with a circular button that serves as a visual and plastic fulcrum for the entire composition. The generous proportions (7.5 cm diameter) and the solidity of the structure reflect the aesthetic canons of 19th-century European craftsmanship, where functionality merged with a sober but highly material impact formal research. The metal surface is embellished by a layered natural patina, which has turned to brown and warm tones, bearing witness to a long historical experience and a coherent exposure to atmospheric agents. From a technical point of view, the knob retains its original fixing pin, guaranteeing the mechanical integrity necessary for an eventual reinsertion in conservative restoration contexts. The state of conservation is to be considered excellent: the slight signs of wear and small surface abrasions are perfectly consistent with the production period and functional use.
