Until 1919 for some 30 years he remained engaged in Carlism; in 1909-1917 he was heading the regional Valencian branch of the movement and formed part of the national Carlist executive.

One historian claims that he originated from "a rich family of landholders" traditionally related to the city of Onteniente (Valencia province);[3] its descendant was his father, José Simó Tortosa[4] (died before 1917[5]).

Apparently a lawyer by education, he became a prestigious local personality; in the late 1860s he acted as "abogado suplente" and "juez de paz" in Onteniente.

[21] In the 1930s some of them were active in Catholic politics,[22] though none assumed a major role; José and Eduardo were executed by workers’ militia during outbreak of the revolutionary terror in 1936.

[43] Already the provincial party deputy leader, when in 1907 he was co-launching a new periodical, named El Guerillero, Simó declared that “la táctica del guerrillero sea nuestra norma de conducta.

[48] When in 1909 the Carlist king Carlos VII passed away, in what he thought a purely procedural gesture Polo handed his resignation to the new claimant, Jaime III.

[66] Though following Navarre, Vascongadas and Catalonia the Valencian region was one of those with most significant Carlist presence, Simó is not recorded as particularly engaged in shaping the nationwide party policy; he focused rather on local Levantine issues.

[67] As his concejal term expired, during general elections of 1914 Simó represented Carlism in Valencia; modest 12,192 votes were sufficient to ensure his triumph.

[70] He was rather banking on deputy status either lobbying in central offices for the Valencian agricultural producers[71] or executing local propaganda activities, e.g. speaking at closed meetings[72] or open rallies.

[73] As outbreak of the Great War produced split of the Spanish public opinion into a pro-Entente and neutralist (effectively pro-German) factions, Simó opted for the latter, and Diario de Valencia regularly published articles and photos favoring the Central Powers.

[75] The Valencian Traditionalists joined a wide right-wing coalition with just one candidate, Luis García Guijarro;[76] Simó engaged in his propaganda campaign.

[78] In the mid-1910s Carlism was increasingly trapped in internal conflict between the claimant Don Jaime, during the Great War largely incommunicado in his Austrian residence, and the top party theorist and charismatic speaker, Juan Vázquez de Mella.

[80] It is not known whether personal changes in top layer of the Levantine Carlism were related; in unclear circumstances before mid-1917[81] Simó was already replaced as jefe regional by Llorens, though he remained in the executive.

[82] In early 1918 he was still referred in the press as ex-jefe, until in March he emerged in what appeared to have been a collective executive, "Jefatura Regional Jaimista",[83] His renewed 1918 bid for the Cortes, this time from Alcoy,[84] failed.

[85] In early 1919 Don Jaime managed to leave Austria and arrived in Paris; he issued declarations which pledged to look into alleged collapse of discipline in the party ranks.

In February and as member of "Junta Provincial Legitimista" Simó co-signed an open letter to the interim national leader Eduardo Cesareo Sanz Escartín.

[116] On the one hand, it supported the idea of doing away with the corrupted restoration regime and saw the military as an agent of change; on the other, it was anxious to retain its own identity and not to melt down in broadly designed and amorphous institutions of primoriverismo.

[122] In 1926 as co-representative of Cámara Oficial de Comercio, Industria y Navegación he entertained Primo in a Valencian factory[123] and supported the plebiscite, intended to reinforce the powers of the dictator.

[125] Almost immediately following the fall of Primo, in early 1930 Simó tried to resuscitate the concept of socially minded Christian-democratic party; the efforts were undertaken by some of his old fellow PSP members, like Angel Ossorio y Galardo, Luis Lucía y Lucía or Severino Aznar Embid, though also by new collaborators, like Maximiliano Arboleya Martínez and José María Gil-Robles.

[130] In the newly emergent republic Simó's mandate as gestor of Diputación Provincial was immediately cancelled,[131] though he retained his freshly won seat in the town hall.

In 1933 he supported works on Estatuto Valenciano, a would-be autonomous legislation,[146] and as consejal declared in favor of bilingualism, which would equal the status of Valencian dialect with this of castellano.

[147] Prior to general elections of 1933 DRV nominated him[148] the party candidate on a joint right-wing list,[149] but quoting health reasons[150] and the need to make way for the young, he withdrew.

[154] Another attempt to win a Cortes mandate, in February 1936 from the Valencia province district,[155] produced support of 130.038 voters; though it was Simó's largest following ever recorded, it was also insufficient to ensure a ticket in the large suburban constituency.

[157] After the July coup he was detained; following a few weeks in prison, he was extracted in one of the sacas and together with 2 sons, brother and nephew[158] executed at a place known as Picadero de Paterna.