AFARS & ISSAS (1969) Cathedral*. Scott No C54. Yvert No PA61. Die Proof in black signed by the engraver DECARIS.
AVAILABLE AT $120
AFARS & ISSAS (1970) Afar Dagger*. Die proof in brown on watermarked paper (rare) signed by the engraver AUFSCHNEIDER. Scott No 338, Yvert No 357.
AVAILABLE AT $80
AFARS & ISSAS (1972b) Calmette*. Guerin*. Bacterial culture*. Die proof in violet signed by the engraver QUILLIVIC. Scott No C71, Yvert No PA77.
AVAILABLE AT $140
AFARS & ISSAS (1974) Marconi*. Stage die proof in violet-brown signed by the engraver BEQUET. Scott No C89, Yvert No PA98.
AVAILABLE AT $175