Sumatra. Djambi. Black or violet overprint Nippon/MA on Kreisler nos. 421z-15b, 16b, 17b (damaged), 18b (used), 22b (faults), 26b (faults), 27b (used, not recorded), 422z-19a, 20b (faults), 21b (faults) and in combination with violet small Dai Ni Hon Yubin overprint nos. 871v/421v-17b unused and used, 20b used. Most signed Boekema. ca. € 775 (17b not counted, 27b not recorded)

Sumatra. Djambi. Black or violet overprint Nippon/MA types 421 and 422 on 17 used or unused stamps. Some signed Boekema. Ca. € 850 (10 cent Van Konijnenburg damaged, not counted, 7½ cent Dancer not recorded, including no. 871v/421v-71

Sumatra. Djambi. Black overprint Nippon/MA on 1, 3 and 4 cent Kreisler nos. 421z-15b, 18b (cancelled Moeara-/Boengo) and 20b. Nos. 15b and 20b signed Boekema. € 175

Sumatra. Djambi. Black overprint NIPPON/MA on postage dues 10 and 20 cent nos. 433z-82a and 84a (signed Boekema), both cancelled Moeara-/Boengo. € 280

Sumatra. Djambi. Black overprint NIPPON/MA on Kreisler 2, 3 and 4 cent nos. 431z-16b, 18b and 20b, and Numeral no. 431z-42, all cancelled (the 3 Kreisler beautifully cancelled Moearatebo). Signed Boekema. € 600

Sumatra. Djambi. 2½ Cent postage due with black overprint NIPPON/MA no. 431z-78a on piece, cancelled Moearatebo. € 200

Sumatra. Djambi. 5 Cent postage due with black overprint NIPPON/MA no. 431z-80a on piece, cancelled Moearatebo. € 200

Sumatra. Djambi. 7½ Cent postage due with black overprint NIPPON/MA no. 431z-81a, unused. Signed Boekema. € 200

Sumatra. Djambi. 10 and 20 Cent postage due with black overprint NIPPON/MA nos. 431z-82a on piece and 84a, both cancelled Moearatebo. € 280

Sumatra. Djambi. 30 Cent postage due with black overprint NIPPON/MA no. 431z-86b, cancelled Moearatebo. € 200

Sumatra. Djambi. 1 Cent Kreisler with black overprint NIPPON/MA no. 432z-15a, cancelled Moeara-/Tambesi. Signed Boekema. Rare stamp! € 300

Sumatra. Djambi. 2 Cent Kreisler with black overprint NIPPON/MA no. 432z-16b, used. Signed Boekema. Rare stamp! € 300

Sumatra. Djambi. 3 Cent Kreisler with black standing overprint NIPPON/MA no. 432z-18a, cancelled Moeara-/Tambesi. Signed Boekema. Rare stamp! € 300

Sumatra. Djambi. 5 Cent Numeral with black overprint NIPPON/MA no. 432z-42, cancelled Moeara-/Tambesi. Signed Boekema. Rare stamp, seldom offered! € 400

Sumatra. Djambi. 10 Cent Van Konijnenburg with black overprint NIPPON/MA no. 432z-43bg, used. Rare stamp! € 300

Sumatra. Djambi. 5 Cent postage due with black overprint NIPPON/MA no. 432z-80a on piece (Postal Savings Bank Form), cancelled Moeara-/Tambesi 20.7.42. € 125