gas mask

  1. P

    S10 respirator filter questions.

    I've been trying to find out the history and names of the 2 (technically 3 if you're counting left over Mk.2 No.1 S6 filters) filters used with the S10 and exactly what designations were used, the later more common PS10 filter's name i do know however its designation might've been the L12A1...