GABON (1985) OPEC. Imperforate pair. Scott No 593, Yvert No 593.
AVAILABLE AT $10
CONGO (1973) Oil refinery - Djeno*. Imperforate corner block of 4. Scott No C151, Yvert No PA153.
AVAILABLE AT $25
CONGO (1973) Off-shore drilling platform*. Imperforate corner block of 4. Scott No C152, Yvert No PA154.
AVAILABLE AT $25
CONGO (1973) Off-shore installation*. Imperforate corner block of 4. Scott No C154, Yvert No PA156.
AVAILABLE AT $25