Cover from Orihuela labor camp to Murcia with censor, 1938

Cover from Orihuela labor camp to Murcia, franked with Edifil 683 & 687 and with censor mark of the camp (Heller RO7.1). Sender's info on the back: "Carlos Casal Rivas, Campo Trabajo, Orihuela". Orihuela postmark dated on July 26, 1938. With content giving information about the mail rules in the camp: "We can only send a letter per week from here, and as the text is limited we only write one side of the sheet, they don't allow anything else".