Title: Folding square
Object type: Folding square
Date: late 17th–early 18th century
Artist:  Michael Butterfield 
Artist bio: ca. 1635–1724, worked 1678
Artist role: Maker
Medium: Brass
Dimensions: Length: 6 1/2 in. (16.5 cm)
Classification: Metalwork-Brass
Credit line: Bequest of W. Gedney Beatty, 1941
Department: European Sculpture and Decorative Arts
Repository: Metropolitan Museum of Art, New York, NY