The coin described here is an unusual class XVb (head facing left) pyramids type penny of Edward the Confessor. The metal appears base, and XRF analysis confirms just 28% silver. The piece is likely a contemporary counterfeit and has a provenance from L.A. Lawrence by private treaty in 1902-3 and then the Lord Grantley sale of 1944. Lawrence had seen a second example, which has not yet been traced.
BNS Research Blog 