ADCA - Knobs

Point your camera at an antique doorknob and find it in the ADCA archive. The Antique Doorknob Collectors of America has catalogued over 4,000 doorknobs since 1981. This app puts that archive in your pocket — and lets you search it by sight. IDENTIFY BY CAMERA Frame a knob in the ring and the app matches it against the full archive. No account, no signup, no internet connection required — the entire catalog and the matching model live on your phone. BROWSE THE ARCHIVE Every knob, organised by ADCA's classification system. Search by name, ID, or manufacturer. HELP IMPROVE IT If the app gets it wrong, you can point it at the right knob. If a knob's photos are poor, you can add a better one. Contributions are reviewed by ADCA before anything is accepted. Built for collectors, dealers, restorers, and anyone who has ever wondered what's on the door in front of them. The Antique Doorknob Collectors of America is a nonprofit organisation dedicated to the study and preservation of ornamental hardware.