Watch List notes:

(x) Viking Kingdom of York, Regnald (c.919-921), Penny, 1.08g, Hand type, + racnolt, open hand pointing downward, in beaded inner circle, rev. eiaricect, Karolus monogram in beaded inner circle (N.531; S.1010), chipped and creased with cracking, otherwise very fine, extremely rare.
Provenance:
Spink auction , 24 September 2013, lot 531

Though North describes the Karolus monogram as 'blundered', here it is neat and entirely correct.
Estimate: £1,500 - £1,800