About 5 years ago I rolled the dice on a RSM chinese made LSR mount with ZF39 scope. The mount was decent. But the scope was not. The more I fired it the more it lost its focus. I reached out to RSM and got no response for months. After I finally found a decent vintage (probably not WW2 vintage though) Hensoldt scope, they responded. But it was too late.
Sarco also had some ZF39 scopes that I saw on their table once at a show. They looked good but I couldnt find on the box where it was made. Some claimed the Sarco scope was made in Taiwan. But I dont know for sure.