unfortunately the photos do not work, your photo is not very colour real. If I understand you right, the object is not in your hands and you can not answer some questions I have.(Weight, measures, other marks etc.)
If the object was made somewhere in Europe (Germany, Austria-Hungary = my guess, France or England) it should have some additional marks though objects for the export sometimes went unmarked to the foreign country and get there the legal marks. To Russia exported goods mostly had the marks of the origin country + the Russian import mark. The for me dubious (form and make) Russian import mark should make you careful - it is an "unmarked " rosÃ© gold (?)object of simple construction and design. At least I would let it be tested at some trustworthy jeweller - if the gold content is legit.
Maybe more after you have the box in your hands....