Square size 5×5 cm. King height 76 mm, pawn height 39 mm. The playing field opens to reveal a carousel-style storage system for the pieces. Piece compartments use a spring mechanism and end with cartridge-style bases. Steel thickness 1.5–5 mm, coated to prevent rust. Riveted construction. Chess pieces are made of steel and brass, with bases shaped like cartridge ends. Pieces are stored in a “loading” manner. The box is made of pine, with hinges and locks, in the style of a military crate.