In Roy Strong's exhibition catalogue Artists of the Tudor Court: the Portrait Miniature Rediscovered 1520-1620, London, V&A, 1983, this miniature was cat.no. 110. Strong attributed it to Nicholas Hilliard, suggesting it was probably copied after a portrait by Levina Teerlinc from 1550, and was possibly of "Edward Seymour, 1st Earl of Hertford and 1st Duke of Somerset", and dated it to c. 1600.

In a recent reassessment of the workshop practice of Nicholas Hilliard Katherine Coombs and Alan Derbyshire of the V&A re-examined this miniature. Their conclusion was that "the miniature clearly dates from the 1550s". They further noted that the gold inscription, though 'not of a high quality, is in Hilliard’s manner.' (See Katherine Coombs and Alan Derbyshire, 'Nicholas Hilliard's Workshop Practice reconsidered', in 'Painting in Britain 1500-1630: Production, Influences and Patronage', ed. T.Cooper et al, Oxford, 2015, pp.241-251.). The inscription in the manner of Hilliard is discussed in the light of other works pre-dating Hilliard which are inscribed in Hilliard's characteristic curling gold calligraphy: such as Hans Holbein's 'Lord Abergavenny' in the collection of the Duke of Buccleuch. This suggests that it is plausible for this miniature of an unknown man to date from the 1550s but have an inscription added by Hilliard in the late 16th century. It is worth noting that the inscription on this miniature - 'Aetatis suae' - is unfinished, as the age of the sitter has not been added, and was perhaps unknown to the person adding the inscription.