i found more information. This is the catalogue from the most recent Grand Duchess's Bruun-Rasmussen auction:
http://www.bruun-rasmussen.dk/vfs/catal ... svaria.pdf" onclick="window.open(this.href);return false;
on page 37 you see a set of guilded silverware. some aspects of the silver is identical. these pieces were made by Vasili S. Semionov and assayed just after my pieces. Semionov is not listed on this site and i cant find an example of his mark. hope this helps. also some silver pieces in the collection listed say maker unknown, is this common?
[url]http://img20.imageshack.us/img20/4517/unledldg.png
1414
Russian flatware of fire-gilt silver, the handles
set with the cast armorial crest of the princely
Kozakov family. Comprises 12 knives entirely
of silver, 12 forks, 12 spoons, 12 teaspoons, 1
ladle and 1 serving spoon. Maker Vasili S. Semionov.
Moscow town marks 1840, 1871 and
1882. Assay mark of Viktor Savinkov. (50).
Provenance: Purchased in the 1950s by the present
owner from the antiques dealer Ferlov at Bremerholm
2,Copenhagen.