Back part of cover franked with 1ct. in block of 6 + 5ct. in block of 3 + 10ct in pair + 25ct, all with "THRACE INTERALLIEE" overprint, cancelled with KCANTHY*1 III 920", arr. "ΑΘΗΝΑΙ*19 ΦΕΒ. 20". (Hellas 31+33+34+36).