Stereo Russian pipe for field artillery, complete

A rare set consisting of a stereo tube of a field artillery sample produced by the Optical Plant of the Main Artillery Directorate (the former Hertz factory) in 1917, a tripod and a uniquely rare box for carrying it, which completely preserved the original coating and inscriptions, as well as belts and internal partitions. In everyday life, this box served as a chair when using a pipe in shallow protective structures. A museum-level kit!