Several German naval officers ( including Wilhelm Canaris ) visited Spain and struck a deal with a Spanish businessman , Horacio Echevarrieta .
The Spanish government , during General Primo de Rivera 's dictatorship , showed interest in obtaining such a submarine for the Spanish Navy .
Several German naval officers ( including Wilhelm Canaris ) visited Spanish and struck a deal with a Spanish businessman , Horacio Echevarrieta .
The Spanish government , during General Primo de Rivera 's dictatorship , showed interest in obtaining such a submarine for the Spanish Navy .