Let's pick this one up again. As You know, I do still have this Valjoux 92:
I am not sure a case for a Valjoux 23 is going to be suitable, but will compare the two again. Diameter is the same, but the location of the stem might be different, and then the whole geometry doesn't fit. Valjoux 7733 cases, that are abundant (as we can see above), are too big - the 7733/7734 is 31mm. 7750 cases wont do either.
Of course I still do have this Valjoux 92 case, which is of a shitty quality, and I got into quite a dispute with the seller, but as You know it is difficult to get Your money back on ebay:
Anyways, first I do need a dial. I like this one:
But it is "old style", more suitable for a classic case, maybe with square pushers, not a diver. It is also fucking expensive.
Now I also bought this empty Nivada case, because I still need a such bezel:
I don't know whether it fits to a Valjoux 92 yet, as these Nivadas where available with different movements. Plus I would still need a suitable dial. For this watch, I will also need to find someone to make a "see-through" back. Maybe my watchmaker can help, I think he has made such a thing before. You can take the original back, but only if it is "thick" enough - to make a fitting for the glas requires a minimum of material.