Cf. Tony Stevenson, 'A Review of Bow & Worcester Knife & Fork Hafts', E.C.C. Transactions, Vol. 13, pt. 3 (1989), pl. 187b, for the example in the British Museum.
The crest is that of the Reverend John Coxed, Doctor of Laws and Warden of New College, Oxford, who died in 1757 as Warden of Winchester College.