Good morning Qrt.S
I guess it is B.C for Victor Savinkov (PL 2112) unless this is one of the mistakes you pointed out earlier (but I forgot details).
There is more controversy here; it looks as if there is something punched
above B.C
within the mark. One would expect St George punched separately as shown bellow, not incorporated within the mark itself, at least what I have seen.
Monogram in Fraktur (Schrift) can be explained if added later as engraving, but this one is in niello technique, therefore it must have been done at the same time as the box itself. On the other hand, I remember when I tried to solder a niello watch case and applied high temperature needed for hard soldering; unlike enamel which would break and crack immediately, to my surprise niello was quite resistant and could be polished again. Meaning, there is a possibility the monogram was added later. Nevertheless, marks are not right.
Regards
![Image](https://abload.de/img/nabor_stolovykh_lozheopjjp.jpg)