This dagger belongs to a recognised group within which the present example compares most closely with that taken off Col. Blood at his capture after his bid to steal the Crown Jewels in 1671. The Blood dagger is dated 1620 and is reserved in the Royal Armouries Collection. Two further examples were sold at Christie's and Bonhams; respectively 18 May 1994, lot 55 and 27 July 2006, lot 262.
See C. Blair & J. Wallace, Scots or still English?, The Scottish Art Review, Vol.1, No.9, 1963, pp.11-15, 34-7. Also see C. J. Ffoulkes, Daggers attributed to Colonel Blood, The Antiquiaries Journal, Vol.VII (1927), pp.139-40