Among his earliest works are La melindrosa (lyrics by Enrique F. Gutiérrez-Roig and Luis Gabaldón) and performed at the Teatro de la Latino in Madrid, April 15, 1921, and El príncipe azul, a comic opera in one act (lyrics by Julio Torres and Rafael Robledo) and performed at the Teatro Ruzafa, in Valencia, Spain, on December 14, 1923.
[1][2] On November 8, 1931, he directed an operetta at the Teatro Nacional, in which Caridad Suárez Valdés interpreted the role of 'Valencienne' in the La viuda alegre, alongside Esperanza Iris as ‘Ana de Glavary’, Manolo Villa as ‘Danilo’ and Panchito Naya as ‘Rosillón’.
Muguerza directed Los diamantes de la corona at the Teatro Nacional January 30, 1932, with Panchito Naya, Estelita Echazábal and Paco Salas.
[3] Leaving prior to the beginning of Spain's civil war (1936–39), Severo traveled to Latin America with Palmira Tomas, an opera singer from Barcelona, and her sister Carmen, also a soprano star, to Caracas, Venezuela; Cuba; and later Mexico, settling in Cuernavaca.
Spanish musicians and actors joined Mexico's golden age of cinema, contributing themes based on civil war and injustice.