CHAD (1972) Stylized heart. Trial color proofs in strip of 5 with multicolor. World Heart Day. Scott No 251, Yvert No 244.
AVAILABLE AT $75
FRANCE (1972) Heart. Pacemaker. Deluxe sheet. Mois mondial du coeur. Yvert No 1711, Scott No 1333.
AVAILABLE AT $20
NIGER (1972) Surgeons. Heart-shaped globe. Trial color proofs in margin strip of 5. World Health Day. Scott No C182, Yvert No PA182. Hard to find!
AVAILABLE AT $100
CAMEROUN (1973) Anatomy of heart. Imperforate dated corner block of 4. Scott No C199, Yvert No PA213.
AVAILABLE AT $25
CONGO (1978) Heart. Electrocardiogram. Trial color proofs in margin strip of 5. Fight against hypertension. Scott No 487, Yvert No 532.
AVAILABLE AT $80
NIGERIA (1992) Anatomy of heart. Blood pressure machine. Anatomy of chest cavity. Set of 4 imperforate pairs. World Health Day. Scott Nos 594-7, Yvert Nos 604-7.
AVAILABLE AT $60