German anti-gas mask Lederschutzmaske. Very nice mask, flexible, with all its straps, filter in good condition with its additional anti-arsine filter. Case with paint remains, instructions and spare optics. German WWI gas mask (Lederschutzmaske). Very fine example. Soft leather mask with all straps intact. Filter in good condition, along with an additional anti-arsine filter. Metal container with remnants of original paint, original instruction sheet inside the lid, and replacement optical lens.