You are looking at a Russian German Imperial Egg Box. Made in the early 1900's by famous German silversmith Markus Mayer. The silver egg box, made in Germany, and was exported and sold for Russian Imperial Market.
Stamped with M.M. (Markus Mayer) and silver German standard stamp 800. The silver box in the a size of a pigeon egg, gilted inside with double headed russian imperial eagle on the top of the egg box. Beautiful, rare, and original item.