Cover from San Miguel de los Reyes prison with censor mark, 1938

Cover from San Miguel de los Reyes prison to Valencia, franked with 5c Edifil 745, 15c Edifil 747 and 25c Edifil 749. Unreadable postmark and San Miguel de los Reyes censor mark "D.P. Nº1 - VALENCIA / CENSURA". Info of the sender written on the inner part of the flap (6th Fortification Battalion, 1st Company). With content.