met-medieval-art: Key, 15th–16th century, Metropolitan Museum of Art: Medieval ArtGift of Henry G. M
met-medieval-art: Key, 15th–16th century, Metropolitan Museum of Art: Medieval ArtGift of Henry G. Marquand, 1887Size: Overall: 3 7/8 x 1 7/16 x 7/16 in. (9.9 x 3.6 x 1.1 cm)Medium: Ironhttps://www.metmuseum.org/art/collection/search/468839 -- source link