Canute Quatrefoil type Penny, very rare diademed bust, Swetinc of London

Canute (1016-35), silver quatrefoil Penny (c.1017-25), London Mint, Moneyer Swetinc, diademed and draped bust left within quatrefoil, quatrefoil almost a circle, legend surrounding commences at lower left, +CNVT REX ANGLORV, rev. pellet at centre of voided long cross, over quatrefoil with pellet cusps, legend surrounding, +SPE TINC ONLV NDE, the NL ligatured, weight 1.00g (N.785; S.1157). Well centred, toned, almost extremely fine and very rare indeed with diademed bust.