Hi,
I have identified the maker and silver assay (kokoshnik). This is a family piece from Russian before 1917 revolution. The cup was manufactured and checked in Moscow around 1907.
If possible would like to identified engraved initials in the front of the cup. It seems like there is a russian "И" in the center but could be an "N", however i have no guesses for the other part of the engraving.
Thank you for the help.
andreysoft
http://i.imgur.com/FrZ4iaQ.jpg
http://i.imgur.com/swqKtOG.jpg