2 register covers both with "ΕΛΥΘΕΡΗ ΟΡΕΙΝΗ ΕΛΛΑΣ*ΓΕΝΙΚΟΝ ΑΡΧΗΓΕΙΟΝ" posted both from Ioannina and arr. Arta, franked with Gorgopotamos surcharge values (2 values each cover making both covers a complete set of 4 values). RRR. (Hellas R35/R38).