I found this bucket about 10 years ago on one of Washington, DC’ flea market. It needs to be cleaned properly – see in pictures where I tried to polish a small part of. Below is the information I found on the internet.

With maker's hallmark "Morozov" in Cyrillic with Imperial Warrant of double headed Imperial Eagle to the right.

The Russian silver standards in general use at the XIX. century and at the beginning of the XX. century were reckoned in zolotniks. These would show the purity of the precious metal. Metal purity was measured in zolotniks. 96 zolotniks correspond to pure silver. The most frequently found proportions for silver are 84 and 88 zolotniks. Hallmarks between 1899-1908 means that the kokoshnik is facing left. This mark shows the head of a girl in profile, wearing the traditional Russian high headdress called kokoshnik. The origin of each piece can be recognized by the assay-master's initials behind the head. 

The Russian standard for silver was based on 'zolotnik'. The name comes from 'zoloto' meaning gold. The unit originated as the weight of a gold coin of the same name which circulated as late as 11th century in Kievan Rus. Originally, a zolotnik represented a 1/96 of a pound, later 1/72 of a pound. In the metric system, one zolotnik equals 4,266 grams, 96 zolotniks equal one Russian pound.

Converting the Russian marks to sterling values, we obtain the following comparisons in silver purity degree: 84 zol. = 875/1000

"?. ????????" -mark of trade-house founded by Morozov.

"HK" -maker's mark  

The Russian hallmarks 1899-1903 the women's head wearing a kokoshnik facing to the left the digits "84", where

--"the women's facing to the left" - national hallmark

--the digits "84" confirm that the item is made from silver 84 fineness in zolotnik (equal 875 modern)