Watch List notes:

BRITISH COINS, Other Properties, Hiberno-Norse Vikings of York (895-920), Silver Penny, early period, St Peter Coinage, sword obverse, voided hammer type reverse, 1.37g (N 556; S 1015). Attractively toned, a little off-centre on obverse, pleasing very fine and very rare.
ex Dr W B Parker collection, sold privately to A H Baldwin & Sons Ltd, 1963
from the David Sellwood Collection

Estimate: £2000-3000