In the 2018 edition of Koll's PreisKatalog there was a new variant for the 314S - "0" (version 0). Often times when a new version is discovered/uncovered that proceeds the first version, Kolls will assign a version "0" or even "01" to this variant rather than disrupt the versioning numeration that has existed for years. In the case of the 314S Kolls has identified a color variant "zitronengelb" (German) or lemon yellow that is different from the yellow color of the V1.
Recently I have acquired a vintage collection from the late 1940's/early 1950's that "may" have contained a 314S version 0. Since the only difference between the 314S version 0 and version 1 is the color I attach photos below to show the possible Version 0 between other version 1 examples. In favor of the version 0 argument would be the original box that came with the model. The date stamp on the plain brown cardboard original box is stamped with a "9" which would indicate "1949" - the correct year for the version 0.
The color difference is subtle and I will leave it up to the reader to come away with their own conclusions.