Authentic Vintage World War 2 era original M2 series gas mask. No replaced or altered parts. The gas mask is in a very good to excellent condition. The carrying bag is in a good shape. Comes with Kidney Box.Dated 2 42 NOS: the M2A2 mask with replaceable lenses and improved exhaust valve, minor modifications to the head-harness straps and the mounting of the eyepieces.