Late 1800s or early 1900s vintage solid brass or bronze door hardware, William Morris style, very lovely and ornate. vintage doorknobs. These are original architectural salvage, antique, not newer reproductions
The backplates with keyholes measure about 5 1/2" long and 1 1/2" wide overall. They are 4 3/4" from center to center of the mounting holes, and the door knobs measure a little over 2" in diameter.