This is an ebonized wood cabinet knob circa 1880 in the Eastlake style of furniture. It has a cast brass faceplate with a radiating design reminiscent of a flower. The steel rod off the back is not threaded, so this will need to be glued into place to use.

The Eastlake Movement was an American nineteenth-century architectural and household design reform movement started by architect and writer Charles Eastlake (1836-1906). Charles Locke Eastlake was a British architect and furniture designer, born in 1836 in Plymouth. He died in 1906. While he did not build furniture, his designs we popularized and produced by professional cabinet makers. His 1868 book, Hints on Household Taste in Furniture, was published in the US in 1872 and was influential in both his home country of Great Britain and also in the United States.

The furniture designed with his aesthetic ideals became known as Eastlake style furniture; it featured intricate incised details reminiscent of old English and Gothic elements. Eastlake furniture was accessible to all classes of society, simpler examples were sold through mail order catalogs and known as Cottage Style furnishings, and finer quality furniture was produced by reputable companies such as Herter Brothers. Commonly seen elements of Eastlake style furnishings include ebonized wood hardware, incised scrolling details, and whimsical scalloped borders.