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A Swiss Army soldier pictured on the 21st of April 1988 demonstrating the use of the 'Trinkvorrichtung' (drinking device) which was standard issue with the newly-introduced SM-90M gas mask. The SM-90M was introduced in Swiss Army service in the late 1980s/early 1990s. The soldier is also wearing the M71 steel helmet, a Swiss design which albeit grotesque in appearance was very comfortable and stable. (Photo by Hannes Heldstab/RDB/Ullstein Bild via Getty Images)