Offa of Mercia Silver Penny, small flan type without portrait; obv. OFFA REX in two lines divided by a line of pellets with a cross at each end; rev. ETHELVALP in two lines divided by a line of pellets with an ornamental cross at each end; scattered pellets both sides; possibly London or Canterbury light issue of 780-792; slightly ragged edge but very clear lettering, GFine for issue, VERY RARE