Bronze gilt, bow of the key illustrating a fleur-de-lis flanked by a lion at the left and a castle at the right, the side arches of the key with feathering, surmounted by the Royal crown, ornate feathering on the stem and collar, the cypher of King Alfonso XII (1874-1885) on the bit, 40.5 mm x 106 mm, nice detail, extremely fine.