Proof Zaire, 1973, 0.04z, 0.18z Third International Fair at Kinshasa, imperforates (793P, 795P), two imperforate proof sheets of 50 of both denominations, one of each inscribed "OK for colour" and initialed in the B. selvage; also perforated sheets as issued for the three denominations in the set, two of the 0.07z, one inscribed "OK for colour" and initialed in the B. selvage; very fine