Chatelaine in gilded metal. Pocket watch chain in gilt metal and agate. With representation of a tortoise in the upper body. Measurements: 22 x 5 cm. The Chatelaine is an ornament used by both men and women and generally attached to a belt or pocket, with chains with hooks to hang small items such as watches, keys, stamps, tablets, scissors and wallets. This piece belongs to the personal collection of Don Juan José Ontalva (Chinchón, 1930- Madrid, 2019), a famous watchmaker from Madrid, descendant of several family generations dedicated to the world of watches. During his career he achieved a high degree of precision and skill, becoming the master of other watchmakers. He is currently recognised for numerous works, including the commissioning and restoration of the Billeter astronomical clock, located in the Congress of Deputies.