Watch List notes:

William the Conqueror (1066-87), Penny, 'PAXS' type, Dover, Leofric, 1.40g, 3h, rev. + LIEEFRIC ON DOFR (EMC 1200.0618, same dies; N.848 - Crown 1; BMC VIII; S.1257), a striking coin with beautiful iridescent toning, about extremely fine, scarce thus.
Provenance
The Isladulcie Collection of Medieval Pennies and Fractions
Goldberg 75, 24 September 2013, lot 4299, wherein formerly in NGC holder, graded MS61
Estimate: £600 - £800