I can tell something about Schaublin Headstocks:
The old ones had a double row cylindrical roller bearing with tapered bore.
To adjust the bearing play, you drive the inner race onto a taper which has to be on the spindle.
These bearings are high precision bearings and quite expensive, a single one costs about 650$ (had to replace the one on my schaublin lathe...
When you have such a bearing, you will get very good surface finish. But the bearing alone is not everything.
To reach a good surface, you will need to be able to adjust all the guides to almost no play and therefore they should not be worn out.
Also the headstock should be machined very exactly including precision ground/precionsion machined bearing seats to provide a good fit on the outer race.
To get stability, the headstock needs to be scraped in onto the bed / headstock mounting surface to get a "full contact" surface.
If you are able to do all this and willing to spend a lot of time and quite some money, then go for it.
Otherwise I recommend to search a little longer and get yourself a used lathe in good condition with the desired specifications like collets in the spindel and everything else you want.
ps: I bought me a used 102VM and have been restoring it for quite a long time.
may help you with the lathe identification....