Curious silver hallmark

[inmotion]

Hello to the community,

I was wondering if anyone around has a clue about the following silver marks. I am not sure the crown is the german import hallmark, nor the 84 cartouche stands for Russian imperial imports (after 1815).



Any clarification on the matter would be highly appreciated!

Thank you!

[silverly]

A possible related post: http://www.925-1000.com/forum/viewtopic.php?t=25091