Of, pertaining to, or characteristic of Czechoslovakia or its people.
1943 September and October, Chas. S. Lake, “Some Continental Travel Experiences (1922-1934)—IV”, inRailway Magazine, page288:
The thieves got away with very little money, however—about 10 German marks, a fewCzechoslovak crowns, and some 10 Belgian francs—so the share-out between four of them would be very small and disappointing.