A couple of observations. Anytime I see a particularly clean black dial from a watch made in the 1950s, and especially when the other parts of the watch are not equally pristine, I am skeptical of originality. That would include the one posted above by
@qazwsx1.
I also agree with the above poster who points out the lack of a minute/second mark on the OP's example.
I have owned quite a few early Geneves, but only one with a black dial. Note the condition of the dial (below), which I would say is consistent with its age, and quite different from the two above. Omega produced so many watches that it is risky to generalize, but it is well known that the finishing lacquers employed on their dials from this period tended to degrade more than some (or most). So to find an original, seemingly pristine black dial from that period, strikes me as being unlikely.
Note also that there were 'correct' replacement dials subsequently produced for these Geneve models, and that would likely explain some of these types of examples.
One other, related note. It is unclear to me whether or not flat hands were
ever used on these models, but they strike me as being dissonant. I believe that dauphine hands with a raised 'spine' are correct. Given the attention to detail that was evident in these models, notably the chamfered lugs, I find it difficult to believe that flat hands would have been used originally.
Even the period adverts display the raised style, and illustrate how light is reflected differently than it would be given flat hands:
