Wait that would make it Faberge if it is 0-0? I'll start having a look :).
Ok after a brief search, even though there is lovely detail-it doesn't bare the Faberge mark, as far as I know.
The 84 is for I believe 875/1000 silver, the leaf next to it is I believe for St Petersburg 1873-1898. Now to ID the maker. OK more narrowed down date, the combined mark as featured was used between 1882-1899. Link to this info:
http://www.925-1000.com/Frussia_city_01.htmlAnders did work in St Petersburg around this time-frame, but was a master goldsmith.
Unfortunaetly I can't identify a positive match with regards to the maker. If you want you could put the piece on the site in the link, they help me identify marks and have a forum that should help more :).
Sorry I couldn't be of more assistance, I would conclude the dating and purity mentioned are correct. However I feel it is not Faberge, due to the lack of significant marking. However the piece is beautiful, and there is the chance I'm wrong also the fact that Anders was working in St Petersburg. Great piece, I love Russian enameled silver.