Bohemian fine china made in Czechoslovakia has a variety of makers marks stating that the item is made in Czechoslovakia, typically on the bottom or sides of the pieces. Featuring floral and bird patterns with vivid colors, most of the pieces were made between 1918 and 1938. Some sets feature newer marks from the 1980s up to 2006.
After World War I, Bohemia became the core of Czechoslovakia, so pieces made after 1918 are marked as made in Czechoslovakian rather than Bohemia. Many of the porcelain marks include an image of a crown and the letters RK or RKG for Rudolf Kämpf Grünlas. Some of the marks feature the country of origin. Bohemian china made between 1911 and 1945 featuring the RKG mark tends to be dinner sets with a few tea and coffee services.
The border regions of Bohemia known as the Sudetenland had a primarily German population and were annexed to Nazi Germany in 1938. Some porcelain pieces made between 1940 and 1950 feature an eagle mark with a swastika above a crown and the letters RK. Some marks on pieces made in 1945 and later feature towns such as Lou?ky or Windsor above the crown image and RKG with the phrase "China de Boheme" underneath.