Austria Levant 1904 Underpaid Cover / Railway

envelope from Constantinople to the Director of Railways Smyrne, Turkey, bearing Levant Yvert 34, "1pi on 25 heller" blue tied by Constantinople datestamp with Austrian Levant Postage Due Yvert 4, "2 p on 40 heller" green tied by Smyrna Oesterreichisch Post (Tchil Type K) double-ring. Rare combination. (pt)    ID: 19834