Watch List notes:

William I (1066-1087), penny, Northampton, Saewine, two stars type, crowned bust facing, between two stars, rev. cross botonnée over quadrilateral, annulet in centre, wt. 1.35gms. (S.1254), certified and graded by NGC as Mint State 62
In the current cataloguer's opinion, the piece seems quite undergraded.
(1250-1750 GBP)