Sumatra. Palembang. Signet ring overprint IPL of postmaster I.P. Lengkong in orange on 15 cent Kreisler, 15 and 50 cent and 1 gulden Van Konijnenburg nos. 522o-26b, 44, 51k and 54k, unused, 50 cent signed Boekema

Sumatra. Palembang. Signet ring overprint IPL of postmaster I.P. Lengkong in violet on 10 cent Van Konijnenburg no. 522v-43bg, unused

Sumatra. Palembang. Signet ring overprint IPL of postmaster I.P. Lengkong in violet on 80 cent Van Konijnenburg no. 522v-53k, unused

Sumatra. Palembang. Signet ring overprint IPL of postmaster I.P. Lengkong in orange on 5 and 7½ cent Dancer nos. 522o-70 and 71 26b, 44, 51k and 54k, unused, 50 cent signed Boekema

Sumatra. Palembang. Signet ring overprint IPL of postmaster I.P. Lengkong in orange on 30 cent airmail stamp no. 522o-76, unused

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 1, 2, 2½, 3, 3½, 4, 7½, 20, 25, 35 and 40 cent Kreisler nos. 523z-15a, 16b, 17b, 18b, 19a, 20b, 22b, 27b, 28a, 31b and 32b, all unused, some signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 5 cent Numeral no. 523z-42, used

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 5 cent Numeral no. 523z-42, unused

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 30 cent Van Konijnenburg in pair no. 523z-48, unused

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 50, 60 and 80 cent Van Konijnenburg nos. 523z-51k, 52g and 53g, unused, 60 cent signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 80 cent Van Konijnenburg no. 523z-53g, unused, signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 2½, 4, 5 and 7½ cent Dancer nos. 523z-67, 69, 70 and 71, unused, except for the 7½ cent all signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 1, 5, 10, 15, 20, 30 and 40 cent and 1 gulden postages dues Indies printing nos. 523z-77b, 80b, 82b, 83b, 84b, 86b, 87b and 88b, unused, except for the 1 gulden all signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 15 cent postage due in combination with violet IPL overprint no. 523z/571v-83b on piece together with 83b (= without overprint) and 561z-77a 2x (only the 15 cent with overprints is without faults)

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 5 cent postage due in combination with violet IPL overprint no. 523z/571v-80a, used and signed Boekema

Sumatra. Palembang. Signet ring overprint BST of postmaster Boestam in black, locally used in Sekajoe, on 7½ cent postage due in combination with violet IPL overprint no. 523z/571v-81a, used and signed Boekema