Netherlands 1558 - 1617Engraving B.72

This filter is part of a complete set of a German gas mask dating to the First World War. This may have been a spare filter which was attached to a mask.Metal cylindrical filter with removable screw on lid. Lid has perforated edges presumably for grip and a cast inscription on top. Lid twists to remove and gives view of interior filter of wire mesh and other material. This section in turn screws onto mask. Base of filter has mesh layers of varying sizes and appears to have once had a paper cover which may have been torn off upon first use; small pieces of paper still attached.Engraving on lid reads "GJB".german, germany, world war i, world war 1, first world war, the great war, chemical warfare, gas mask, gas warfare, mustard gas