German pioneer rucksack. In heavy Feldgrau canvas, all straps are present. The metal strap reinforcements are marked LUX. The main strap is marked 3S and is a different colour to the other straps. Internal markings are present but illegible as they have been stamped. New from stock. Condition I+. German Pioneer backpack Made of heavy Feldgrau canvas, all straps present. Metal strap fittings marked LUX. Main strap marked 3S and of a slightly different colour than the others. Internal markings present but illegible due to faint stamping. Unissued stock piece. Condition I+.