Sumatra. West Coast. Violet or black cross overprint for the West Coast and Riouw in combination with violet or black, small Dai Ni Hon Yubin overprint on 21 unused or used stamps, amongst others 5 gulden Van Konijnenburg no. 870v/330z-56. Most signed Boekema

Sumatra. East Coast. Dai Ni Hon overprint in violet type 811 on type Kreisler nos. 15a, 16b, 17b, 18b, 19a, 20b, 21bv (crease, not recorded) and 22b, all c.t.o. Ca. € 300

Sumatra. East Coast. Dai Ni Hon overprint in black or violet type 811 on 16 different unused or cancelled stamps (811v-21a thin spot). Some signed Boekema. Ca. € 440

Sumatra. East Coast. Dai Ni Hon overprint in black type 813 on nos. 15b, 16b, 17b, 18a, 20b, 42, 71, 82a and 84a, used or c.t.o. Some signed Boekema. € 440

Sumatra. East Coast. 10 Cent Kreisler with violet Dai Ni Hon overprint in straight frame no. 821v-23a, used. Scarce stamp! € 240

Sumatra. East Coast. Moehammadijah series with violet Dai Ni Hon overprint in straight frame nos. 821v-61/65, except for the 2 cent all other used (in the East Coast, and also used in Atjeh). The 10 cent is listed only with red overprint, the 15 cent is not listed at all

Sumatra. East Coast. Dai Ni Hon overprint in frame in black, violet, red or orange (no. 821o-71), types 821 and 822 on 40 mainly different unused or used stamps. Some signed Boekema. Ca. € 500

Sumatra. East Coast. Dai Ni Hon overprint in a wavy frame type 830 (several types 831/834), all in black except for one red (no. 832r-42) on 30 different, mainly unused stamps. 7½ cent no. 830v-81a not listed, 2½ cent no. 832z-67 with inverted overprint, 4 cent no. 830z-20a crease (? 12). Some signed Boekema. Ca. € 400

Sumatra. East Coast. 2 Cent Kreisler with purple Dai Ni Hon overprint in straight frame in combination with black Dai Ni Hon overprint in a wavy frame no. 833z/821p-16b, unused. Not listed

Sumatra. East Coast. 5 Cent Kreisler perforated 11¾ : 12¼ with black Dai Ni Hon overprint in a wavy frame no. 834z-21bv, cancelled. € 140

Sumatra. West Coast. Large Dai Ni Hon Yubin overprint in violet or black in combination with violet or black cross overprint, used in the West Coast and Riouw, unused or used, on 12 stamps type Kreisler. Signed Boekema

Sumatra. East Coast. 3½ Cent postcard with black Dai Ni Hon overprint type 813 Bu.160 from Medan 18.6.14 to Bandongan near Magelang (Java). Censor Bu.JC14c

Sumatra. East Coast. 3½ Cent postcard with reply-paid card attached not in offset but in rotogravure print (by Joh. Enschede & Sons, Haarlem), with black Dai Ni Hon overprint in a wavy frame type 832, unused. Signed Boekema. Very rare card!

Sumatra. Tapanoeli. Hinomaru overprint in fine type 211 and coarse type 221, in red, orange or purple on a nice selection of 34 mostly used stamps types Kreisler (amongst others no. 221p-22a unused), Van Konijnenburg (such as no. 221o-53k), Numeral and Dancer. Some signed Boekema. Ca. € 800

Sumatra. Tapanoeli. 10 Cent Van Konijnenburg with violet Hinomaru overprint no. 221v-43bg, used. € 150

Sumatra. Tapanoeli. 2½ Cent Kreisler and 7½ cent Dancer both with Hinomaru overprint nos. 221r-17b and 211p-71, on piece cancelled Taroetoeng 17.9.25 with censor Bu.JC13a. € 60