MADAGASCAR (1954) Woman*. Antsirabé viaduct*. Grey-headed gull*. Trial color proof. Scott No C59, Yvert No PA76.
AVAILABLE AT $12
GABON (1976) Kango bridge*. Trial color proofs in margin strip of 5 with multicolor and color codes in pencil. Scott No 361, Yvert No 354.
AVAILABLE AT $80
GABON (1976) Lambaréné bridge*. Trial color proofs in margin strip of 5 with multicolor and color codes in pencil. Scott No 362, Yvert No 355.
AVAILABLE AT $80