BENIN (1980) Offenbach*. Scene from "Orpheus in the Underworld"*. Trial color proofs in margin strip of 5. Scott No 499, Yvert No 512.
AVAILABLE AT $120
POLOGNE (1955) Chopin*. Yvert Nos 794-5. Scott Nos 666-7. 5ème concours international "Frédéric Chopin" de piano à Varsovie. Essais de couleur, respectivement en sépia et en violet noir, bord de feuille, surchargé "PROBA" (Epreuve) **. Difficile à trouver!]
AVAILABLE AT $140
MONACO (1975) Johann Strauss*. Full sheet of 30 trial color proofs. Yvert No 1042, Scott No 998.
AVAILABLE AT $475
MONACO (1981) Mozart with performers*. Trial color proofs in full pane of 5 triptychs. Scott Nos 1275-7, Yvert Nos 1270-2.
AVAILABLE AT $250
MONACO (1969) Hector Berlioz*. Trial color proofs in full sheet of 30 with printers color codes in margin. Scott No C75, Yvert No PA93.
AVAILABLE AT $600