I believe when these came in they were advertised as being refurbed by the Russians. There were two versions commonly sold, those with crests and those with ground crests.
Personally, I have a bit of trouble believing the Russians did the refurb for a number of reasons but there are also arguments to support Russian involvement. I'll make my observations based on the example I own but there are going to be variations on these so what I see is not going to apply to all. If the Russians did refurb these, then based on my example, they held the standards of the rebuild to a much higher level than the K98k's they also did.
For the Russians: The bluing is identical on my VZ24 to what's on my RC K98k, the use of electropencil to "match" parts is similar (although this was used by several other countries as well), the mix of German and Czech parts, and the missing tg lock screws.
Against Russian refurbishment: Overall high quality of rebuild as compared to the K98k's they did. You see these with repairs to the handguard that are fairly well done, sight protectors and cleaning rods left in place, and old serial numbers ground off before refinishing. These are all things you don't commonly see on the RC K98k's. Care was also taken to stamp the stock serial in the same location as the original would have been. I at first thought mine was the original stock to the receiver but after looking at several other original VZ 24's the number font is incorrect so I think that my stock was force matched at the time of rebuild. It is as new like the op's stock.