One comment on “The Russian GP-5 Gas Mask.

  1. My filter have the following numbers and letters :
    ΓΠ-5
    26-1-72-16
    Φ-4

    Do you have any clue about what they mean? Maybe tha date of manifactured?
    I don’t know..
    I’d apreciate if you could email me back!!

    ~Thanks

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