Watch List notes:

Cnut (1016-36), Penny, Short cross type, Guildford, Blacman, 0.93g, 9h, lys-tipped trefoil headed sceptre, rev. + BLACAMON ON GYLD (EMC 2008.0306 this coin; SCBI [Copenhagen] 13, 1131, same dies; Williams II, 165; N.790; BMC XVI; S.1159), darker tone, a pleasing very fine/about very fine, a seldom encountered mint, very rare.
Provenance
The Isladulcie Collection of Medieval Pennies and Fractions
Found Ickleton, Cambridgeshire, 2008
Estimate: £600 - £800