Mariner's compas, c 1700s.
© Science Museum / Science & Society Picture Library
Compas in gimbals, with bras bowl and compas cards. This compas is said to have been the property of Sir Isac Newton. The bowl is inscribed with: 'Benj. Ayres fecit Amsterm' and the card is marked with 'J M Kleman fecit Amsterm'.