AI Appraisal Estimate

This item is an antique door lock set featuring faceted clear glass doorknobs mounted on brass hardware. The doorknobs themselves are multi-faceted, reflecting light and creating a decorative effect typical of early 20th-century residential hardware. Each knob appears to be approximately 2 to 2.5 inches in diameter. The hardware components include a brass faceplate for the mortise lock mechanism and two rectangular brass rosettes (or escutcheon plates) designed to cover the boreholes on either side of the door. The brass components exhibit significant patina, indicating age and exposure to elements, with areas of darkening and possibly some verdigris, though the image quality makes precise identification difficult. There is also a visible metal tongue, part of the latch or bolt mechanism, protruding from the mortise lock body. The overall construction suggests a robust design typical of period hardware, likely dating from the early 1900s to the 1930s. There are no clear manufacturer's marks visible in the provided images. The condition points to wear consistent with long-term use, but no major cracks or chips are apparent in the glass knobs. The tarnished brass suggests it has not been recently polished, retaining its original aged appearance, which can be desirable for antique collectors. This set embodies a classic, utilitarian-chic style that was prevalent in homes of its era, combining functionality with a touch of elegance.

Based on my visual examination of the provided image, this Antique Glass Knob Door Lock Set with Brass Rosettes appears to be an authentic period piece, likely dating from the early 20th century (1900s-1930s). The multi-faceted clear glass knobs are consistent with designs popular during that era, and their condition, with no visible cracks or significant chips, is very good for their age, suggesting careful handling or installation. The brass hardware, including the faceplate and rectangular rosettes, exhibits a desirable unpolished patina, which collectors often prefer over re-polished brass. This aged appearance contributes positively to its antique charm and authenticity. The functionality of the mortise lock mechanism cannot be assessed from the image alone, but the presence of the latch tongue suggests it's a complete unit. Market conditions for antique architectural salvage and hardware remain consistent, with a steady demand for well-preserved period pieces. While glass doorknobs were common, the completeness of this set with matching brass hardware adds to its appeal. Rarity is moderate; similar sets can be found, but finding them in good, unrestored condition is becoming less frequent. Factors positively impacting value include the complete set, the good condition of the glass, and the untouched brass patina. Factors that could negatively impact value, but are not apparent, would be non-functional lock mechanisms, damage to the glass, or significant corrosion of the brass. My primary limitation in this appraisal is the lack of physical inspection. Without an in-person examination, I cannot verify the functionality of the lock mechanism, assess the internal condition of the brass, or check for subtle repairs or manufacturer's marks that might be hidden or unclear in the image. Provenance documentation, if available, would further authenticate its history and origin. For a full authentication, I would recommend a hands-on review to test the mechanism, inspect for hidden defects, and confirm material composition.