Manufacturer: Syracuse China
User: Supreme Court of the United States
Date of plate: circa 1927 – 1950s

Photo of the dining room was taken by the 2008 Institute on Federal Library Resources

{"arrow":"false","pagination":"true","speed":"1000","autoplay":"true","autoplay_speed":"2000","loop":"true","slide_to_show_3d":"2","slide_show_ipad_3d":"2","slide_show_tablet_3d":"1","slide_show_mobile_3d":"1","slide_to_scroll_3d":"1","auto_stop":"false","centermode_3d":"true","space_between_3d":"0","depth":20,"modifier":20,"img_rotate":0,"img_stretch":0}

{"animation_fancy":"zoom-in-out","transition_fancy":"fade","fancy_box_loop":"true"}

Notes: From the Wikipedia: "The Supreme Court Building houses the Supreme Court of the United States, the highest court in the federal judiciary of the United States. The building serves as the official workplace of the chief justice of the United States and the eight associate justices of the Supreme Court. It is located at 1 First Street in Northeast Washington, D.C. It is one block immediately east of the United States Capitol and north of the Library of Congress. The building is managed by the Architect of the Capitol. On May 4, 1987, the Supreme Court Building was designated a National Historic Landmark.

"Designed in the neoclassical style, the proposal for a separate building for the Supreme Court was suggested in 1912 by President William Howard Taft, who became Chief Justice in 1921. In 1929, Taft successfully argued for the creation of the new building but did not live to see it built. Physical construction began in 1932 and was officially completed in 1935 under the guidance of Chief Justice Charles Evans Hughes, Taft's successor. The building was designed by architect Cass Gilbert, a friend of Taft."

Per the article, the private dining room is located on the third floor. This story, published in 2018 by Duke University's Judicature, talks about the practice of the justices meeting for lunch when in session and the one subject about which they avoid speaking: https://judicature.duke.edu.

For related info:
United States Senate by Maddock Pottery Co.
United States Senate 2 by Warwick China
U.S. House of Representatives by Shenango China and Cook China

Sources
Wikipedia
Duke University Judicature
2008 Institute on Federal Library Resources – photo of dining room

Contributor:
ID and photos: Ebay seller Cheswick44