Riau 5 Sen-25 Rp imperforate pairs (without 1 Rp.), nearly all very fine (1 ex. 7½ and 35 Sen and both 2 Rp brown spot), cat.v. 12,000(Image 1) (Image)

Riau 5 Sen-25 Rp. imperforate (without 1 Rp), nearly all very fine (7½ Sen, 90 Sen and 2 Rp brown spot), cat.v. 6000(Image 1) (Image)

Riau 5 Sen red imperforate in block of 8 with 2 gutter pairs, very fine (small cut into gutter), cat.v. 960++ (only 10 gutter pairs known)(Image 1) (Image 2)

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Riau 7½ Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair cut into gutter), cat.v. 1040+ (only 10 pairs known)(Image 1) (Image 2)

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Riau 10 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair cut into gutter), cat.v. 12.800+ (only 10 pairs known)(Image 1) (Image 2)

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Riau 15 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair small cut into gutter), cat.v. 1680 (only 10 pairs known)(Image 1) (Image 2)

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Riau 20 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair cut into), cat.v. 1680 (only 10 pairs known)(Image 1) (Image 2)

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Riau 25 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair small cut into), cat.v. 2560+ (only 10 pairs known)(Image 1) (Image 2)

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Riau 35 Sen imperforate in block of 8 with 2 gutter pairs and plate number 71, pair with plate number very fine (other 2 ex, brown spot), cat.v. 440++ (only 10 pairs known and only one with plate number)(Image 1) (Image 2)

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Riau 40 Sen imperforate in block of 8 with 2 gutter pairs and plate number 72, very fine, cat.v. 440++ (only 10 pairs known and only one with plate number)(Image 1) (Image 2)

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Riau 45 Sen imperforate in block of 8 with 2 gutter pairs and plate number 76, very fine, cat.v. 840++ (only 10 pairs known and only one with plate number)(Image 1) (Image 2)

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Riau 50 Sen brown imperforate in block of 8 with 2 gutter pairs and plate number 50, crease in gutter and stamps toned, cat.v. 12,800 (only 10 pairs known and only one with plate number)(Image 1) (Image 2)

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Riau 70 Sen imperforate in block of 8 with 2 gutter pairs, 1 pair brown spot and 1 pair small cut into, cat.v. 440+ (only 10 pairs known)(Image 1) (Image 2)

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75 Sen imperforate in block of 8 with 2 guter pairs, very fine (1 pair small cut into), cat.v. 1040+ (only 10 pairs known)(Image 1) (Image 2)

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Riau 80 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair small cut into), cat.v. 440+ (only 10 pairs known)(Image 1) (Image 2)

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Riau 90 Sen imperforate in block of 8 with 2 gutter pairs, very fine (1 pair small cut into), cat.v. 440+ (only 10 pairs known)(Image 1) (Image 2)

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