met-medieval-art: Key, 15th century, Metropolitan Museum of Art: Medieval ArtGift of Henry G. Marqua
met-medieval-art: Key, 15th century, Metropolitan Museum of Art: Medieval ArtGift of Henry G. Marquand, 1887Size: Overall: 4 ¼ x 1 15/16 x 9/16 in. (10.8 x 4.9 x 1.4 cm)Medium: Ironhttps://www.metmuseum.org/art/collection/search/468908 -- source link