Watch List notes:

Fourpence-Halfpenny Elizabeth I Countermark Portcullis on an Edward VI Base issue Shilling, S.2546, weight 3.80 grammes, Countermark Near Fine, host coin Fair, short of flan between 11 and 1 o'clock, an excessively rare issue and rarely seen in any grade, amongst the rarest of all Elizabeth I silver issues

Estimate: 4000-5000 GBP