Tower of London standard yard rod, 1659.
© Science Museum / Science & Society Picture Library
Inscribed on one face in Roman type capitals with 'This Yarde is examined by me John Reynols and sealed at the Tower of London April 30 Anno 1659'. At a later date it was further inscribed in script style; 'Imperial Yard'. It is made from bras in octagonal section, and stamped at the end with a Westminster portcullis (old type) and illegible cyphers, posibly CRII.