This single-sided seal depicts the earl on horseback to *sinister* wearing chain armour, a conical helmet and shows with pointed toes, holding a lance sloping backward with a pennon with three tails and a device apparently of four roundels in his right hand, and his reigns and shield, with inside shown, in his left.
Image description (reverse)
SIGILLVM DAVIT COMITIS ANGLORV REGINE FRIS (“Seal of Earl David, brother of the queen of the English”)
Dimensions: 2 ¾ in. (72 mm.) diameter.
SW I, p.40.