NIGER (1970) Audio-Visual Pavilion*. Trial color proofs in strip of 5 with multicolor. National Museum. Scott No 224, Yvert No 229.
AVAILABLE AT $50
MONACO (1986) Pierre Corneille*. Le Cid*. Trial color proofs in strip of 5. Scott No 1548, Yvert No 1547.
AVAILABLE AT $80