sentences:  Echevarrieta's imprisonment for his connection with the October 1934 Revolution made the Spanish Navy lose any interest in the submarine, which was finally sold to the Turkish Navy in 1935, in which it served until 1947 under the name of Gür.Despite several problems encountered during the boat's trials, the design was considered satisfactory and the Soviet government bought it, with the condition Deschimag make the suggested improvements and assist with the building of several prototypes, which it did.The modifications resulted in a significant reworking of the project, redesignated E-2.