Registered cover fr. with 5x2l.+5x3l.5x5l. (singles + bl.4) engraved ovpt "ΕΛΛΗΝΙΚΗ ΔΙΟΙΚΗΣΙΣ" in black (read. up) canc. "ΘΕΣΣΑΛΟΝΙΚΗ*20...12", arr. "BASEL*25.III.13", large "E" (pos.91) on 2l. and 5l.. (Hellas 232+232K+233+234+234K).