si-national-museum-of-african-ar:
Plaque, Mid-16th to 17th century, Smithsonian: National Museum of African Art
Size: H x W x D: 44.1 x 19.7 x 6 cm (17 3/8 x 7 ¾ x 2 3/8 in.)
Medium: Copper alloyhttps://africa.si.edu/collections/view/objects/asitem/items$0040:8953