The Lifeguard folding periscope invented and patented by Edgar Duerr, a second-generation family member. The life-saving instrument enabled front-line soldiers to observe enemy movements from 50cm (20 inches) below the parapet, providing them with a view of up to 91m (100 yards). Approved by the War Office and sold to individuals, the pocket-sized periscope weighed (20oz) and measured 11.5 x 11.5 x 5 cm (4.5 x 4.5 x 2inches) when closed.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP23940072
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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