before I stated '...the case manufacturer mark is missing at those refs in general...', that's probably not correct.
It's maybe a Poinçon de Maître which I was not used to yet.
Where usually the Poinçon de Maître (e.g. hammer head X red) would appear, there is instead only a Maltese cross (marked X blue).
Could mean, that the case was produced in house at V&C? - I couldn't answer right now. But it has, of course, a certain meaning.
