Watch List notes:

Mercia, Offa, light coinage (c.779-792/3), penny, London, Ibba, OFFA REX, diad. bust right with diadem ties, with curved shoulders and a collar, rev. +I/B/B/A, (initial cross beaded) in angles of lozenge cross fleury with plain cross in centre, wt. 1.06 gms. (S.905; N.294; Chick 57, same dies), light surface corrosion, almost extremely fine
£3500-4500
We believe this to be one of only three known of this type.