"N° 383 ""10c. on 15c."" (Block of 4) and 407 ""3,50fr. on 3fr."" (Block of 8), both with shifted overprints, VF." (Image)

"N° 420/29 ""Conference of coquilhatville"", full set in full sheet of 100 stamps, vf (OBP €1.600)" (Image)

"N° 538-Cu ""5fr. on 6,50fr."" in full sheet of 100 stamps with spectacular curiosity of misplaced overprint of the metallic silver square on 18 stamps, the other 82 stamps are without silver square, vf" (Image)

N° 387A (2x) without overprint 75c., 396a (inverted overprint), 409a (2x) with inverted overprint, on registered cover sent from Leopoldville-Kalina, August 3rd, 1961 to Brussels Belgium, vf (Image)

N° 308, ,383b (2x) (10c. overprint inverted), 401, 405a (2x) with inverted overprint on registered airmail cover sent from Coquilhatville in 1963 to Brussels/Brussels, vf (Image)

N° 288, 391, 391-Cu (double overprint), 397a (inverted overprint) and 589 on registered airmail cover sent from Mbandaka - 1c. October 1st, 1966 to Liège/Belgium, vf (Image)

"1960/1961 Overprint ""CONGO"", curiosities stock in stockbook +/-450 stamps (from the flowers and animals issues) with curiosities, like inverted, misplaced, double, triple overprints, quality must be checked, vf/f/to be checked" (Image)

"1960/1966 Small collection on old albumsheets incl. 3 minisheets ""Kennedy"", vf/f" (Image)