His sons, Juan and Luis, began a new stage when they moved to a store at number 29 in 1912. Luis set up a refined jewelry store in Red de San Luis and Juan kept the name of Sanz. and the Montera store. Sanz is so successful that they become suppliers to the Royal House. As an example of his work, Sanz mounted a short necklace with seven Columbian emeralds for Queen Victoria Eugenia. The emeralds belonged to a crown made by the jeweler Fontenney for Eugenia de Montijo in 1858. In his exile he dismantled the seven emeralds, which he bequeathed to Queen Victoria Eugenia when she died in 1920. In 1945 the current store on Gran Vía 7 was opened, in the old Casa Hispano Suiza.