Antique Doorknob Collectors of America

Recognizable designs of animals, people, or objects. These pieces often tell a story or symbolize specific meanings.

Knobs that deviate from the standard circular or oval form. These include hexagonal, octagonal, and free-form sculptured handles.

Knobs featuring spiral or swirl patterns that create a sense of motion.

Designs with threefold rotational symmetry.

Designs with fivefold rotational symmetry.

Designs with eightfold rotational symmetry.

Designs featuring concentric circles or rings.

Historical classification for emblematic and fraternal designs (now largely merged with Category P).

Doorknobs made primarily of glass, including cut, pressed, and mercury glass.

Knobs made of composite materials.