20 pa. in B4 "Ελληνική Κατοχή Μυτιλήνης" overprint (reading down) on 1908-1909 Turkish stamps (p.14-15/19-20). One stamp with error inverted "η" on "Μυτιλήνης" (p.19). VF (Hellas 4+4A - cat.price 76€)