A Picasso masterpiece entitled "Femme à la montre" is expected to fetch more than $120 million when it goes up for auction this fall. The piece depicts Picasso's lover and "golden muse" Marie-Thérèse Walter, who featured in many of his portraits. Picasso first met Walter in Paris in 1927 when he was still married to his first wife, Olga Khokhlova, a Russian-Ukrainian ballet dancer. Walter would become...