Attributed to Heinrich Heid von Winterthur, ‘Crossbow of Count Ulrich V of Württemberg (1413–1480)’, 1460, The Metropolitan Museum of Art

dated 1460; German, probably Stuttgart; Wt. 6 lb. 9 oz. (2972 g)
http://www.metmuseum.org/art/collection/search/21940

Image rights: The Metropolitan Museum of Art (Rogers Fund, 1904), licensed under CC0 1.0 Universal