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Keystone View Company Entrenched Highlanders on the Lookout Using Mirror Periscope.

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Gilder Lehrman Collection #: GLC09584.081 Author/Creator: Keystone View Company Place Written: s.l. Type: Stereocard Date: 1914-1918 Pagination: 1 stereocard ; 8.7 x 17.7 cm. Order a Copy

Two Scottish soldiers in a trench use a periscope to look out into No Man's Land above. There is a horn nearby, which is used to warn their fellow troops in the case of a gas attack.

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