Cavendish, William George Spencer, 6th Duke of Devonshire (1790 - 1858) (Stamp 05)
Arms:
Crest: A serpent nowed Three stags heads caboshed
Motto: Cavendo tutus
Dimensions (height x width): 41mm x 29mm
Coronet: Duke
Heraldic Charges: serpentstags heads caboshed (3)
The Bibliographical Society of London