Welcome to the forum,
It is integral that you get pictures of the caseback markings - outside and in - and a movement shot, but there are a few things we can determine in the mean time. This type of dial was used since the genesis of the Compax line in the 30's and all throughout the 40's, but I do not believe that this watch can be from the 50's. Having said that, we have observed the late 40's and early 50's to be a transitional period for the types of dials used by Universal Geneve, so this watch could ostensibly be from this period, albeit unlikely. This is why it is important to get the serial number of this watch in order to get the full picture.
Speaking more specifically about the watch in question, it appears to be in an all-original, all-correct condition. The dial is in poor to fair condition and the case has lost some definition due to polishing. I could see this dial being more attractive in the metal, but if I could make a recommendation, I would hold out for one in a better overall condition even if you have to pay a little more. The dial tells us more than just the aesthetics of the watch. It shows us that the watch was exposed to a fair amount of moisture which can detrimental to the movement as well, and that could mean additional service costs. If you want to pursue this one, I would try to get the price down given its condition.
Good luck
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