Monaco 1975 Historic Cars, Set of Nine

Nine stamps from the historic cars Monaco issued in 1975, each engraved in two colours: the Rolls-Royce Silver Ghost of 1907 (0.05), the Hispano-Suiza H6B of 1926 (0.10), the Isotta Fraschini 8A of 1928 (0.20), the Cord L-29 (0.30), the Voisin V12 of 1930 (0.50), the Duesenberg SJ of 1933 (0.60), the Cisitalia by Pininfarina of 1946 (1.20), the Mercedes-Benz 300 SL of 1955 (1.40) and the Lamborghini Countach by Bertone of 1974 (5.50). None has a postmark. Each stamp is also sold on its own.