Watch List notes:

(x) Vikings of York, Siefred (c.895-920), Penny, 1.28g, +sief red vs, small cross pattée in inner circle with pellets in two angles, rev. r e x and initial cross at limb ends of cross pattee (N.503; S.984), collector's number inked on reverse, otherwise good very fine or better.
Provenance:
Spink auction 82, 27 March 1991, lot 95
Spink Numismatic Circular, October 1990, no. 5928
Estimate: £1,500 - £2,000