Chatelaine in 9kt yellow gold. Model with two bodies, the upper one with smoky quartz of beautiful colour, and dinner in suspension with blue enamel work. Measurements: 24 x 5 cm. The Chatelaine is an ornament worn 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 Congreso de los Diputados (Congress of Deputies).