"N° 86A, 89A and 90A ""10c. on 5c. of the 1915 issue"", ""30c. on 10c. of the 1915 issue"" and ""50c. on 25c. of the 1915 issue"", signed, n° 89A with multiple signature and corner of sheet, vf (OBP €360)" (Image)

"N° 86A ""10c. on 5c. green - bilingual 1915 issue"" (error: normally in bilingual 1910 issue) in block of 40 with corner sheet ""291"", signed SPHB, vf (OBP €480)" (Image)

"N° 89A ""30c. on 10c. carmine - bilingual 1915 issue"" (error: normally in bilingual 1910 issue) in block of 4 with corner sheet, signed, vf (OBP €480)" (Image)

"N° 90A ""50c. on 25c blue - bilingual 1915"" (error: normally in bilingual 1910 issue) in block of 4 with corner sheet and number sheet ""276"", signed SPHB, colored gum, but MNH, f (OBP €480)" (Image)

"N° 91A ""1921 op 1fr."" met typo opdruk ""CONGO BELGE"" in blok van 4, I2-A.2, pos. 28/29 en 33/34, gekeurd Soc. Ph. B. en met fotocertificaat, zm/m/ntz " (Image)