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The GP-1 (Russian: Гражданский Противогаз — "Civilian Gas Mask") was a civilian filter issued with various face pieces during the Second World War.
The filter[]
The GP-1 filter is a cylindrical metal filter containing the various blocking substances. It was fixed to the face piece at the chin.
Face pieces[]
The face pieces were mainly made by local craftsmen and fit to the filter.
The exhale valve, similar amongst most masks, was kept in a metal cage and was made up of two rubber discs.
Sh-2 (Ш-2)[]
The Sh-2 was made of rubberized cloth and had the exhale valve at the side. The eye pieces could be the one of the Sh-1 face piece or just glued ones.
Sh-3 (Ш-3)[]
The Sh-3, identical in setup to the Sh-2, was cheaper to make and was less sturdy. The eye pieces could be glued or crimped.
ShM-1 (ШМ-1)[]
The ShM-1 was a helmet style face piece and had the exhale valve in the front.