Townmark: Moscow 1899-1908
Assayer: Ivan Ivanowitsch Lebedkin 1899
Maker: probably Ivan Ivanowitsch Ovtschinnikov 1875-1896 (?), unclear date but the small round stamp (quality confirmation) points to him. Several stopki and piomki from him in my collecton. Typical quality. PL # 2506
Now you show that you have not done your homework. How can you estimate/collect an object if you do not know at least the most essential marks and how the Russian silversmithing worked.
Please do not ask the forum for private lessons - there are enough books on the market or in librarys which you can read...Knowledge is your friend!!
Lesson 1 - and the last:
In Russia each part which was fitted to an object had to be marked with the silver content (handles, spouts, decorations etc-). Your stopka is made out of 2 or 3 parts - according to the law every extra part had to be marked - a time consuming and ugly method. Immagine each ring of the stand would be marked - so there was this little round stamp to show that all parts were made out of 84 Zolotniki silver.
A guarantee for authenticity stamp is sensless - in those days fakes were unknown - you bought in shops new - today the fakers would fake this stamp too like the others.