Watch List notes:

Caribbean Territories, Jamaica, Edward VII, matt proof, or possible pattern, cupro-nickel halfpenny, 1903, first type, crowned bust r., by de Saulles, rev. shield of arms, horizontal shading, large E with vertical seraph, as on penny (Pr. 70; KM 19), a superb coin of extreme rarity, certified and graded by NGC as Proof 63 matte
Paul Hayward raises the question of the large E and wonders if this coin could be a pattern rather than a proof. Neither Pridmore nor KM list the coin as a proof and it is quite possible that the coin is unique.
(500-600 GBP)