It will come off easily, a good soldering toll (for radio details) careful hands and patience should do the work. The question would be how to solder screw-post back. A good silversmith perhaps.
I think it's 2081312 and this last one 1823497; there's a clear difference between the 3 and 9 on this last star. I have also seen a different type of 3 on MZPP stars, but the difference between the 3 and 9 on this last star is too large to be ignored, I think.