Watch List notes:

(x) Vikings of York, Siefred (c.895-920), Ebraice Civitas series, Penny, 1.33g, blundered legend, rt/ve/ie/rs (for 'sievert rex'), cross crosslet with trefoil of pellets in each angle, rev. +eb iai cec ivi, small cross pattée in inner circle (N.508; S.980), crisp and as struck with a light golden tone, very rare.
Provenance:
Spink Numismatic Circular, December 1991, no. 7959
Estimate: £800 - £1,000