British WWI Soldier's "Lifeguard" Private Purchase Periscope

British WWI Soldier's "Lifeguard" Private Purchase Periscope

5"x5"x2.5" when compacted and stowed in its thick khaki canvas belt case, this extends accordion-style to be a 22.5" tall periscope when deployed.  Embossed with a shield "THE LIFEGUARD / PATENT / PERISCOPE / SOLE MAKERS / F.DUERR & SONS / MANCHESTER / S.W."  One of the mirrors that makes the magic happen is cracked, and the other is missing entirely, though it still displays fine.  The example in the Imperial War Museum is labeled "'Lifeguard' trench periscope made by F Duerr & Sons of Old Trafford, who usually made jams and preserves. Sold privately to soldiers or their families, these periscopes filled a practical need, whilst also helping a local business to make money in wartime.  Consists of two parallel sets of lazy tongs, with mirror holders at each end. In 1915, the periscope cost 12/6 for a "cloth-covered leather-board box", or 15s for a "strong khaki collapsible waterproof case for belt".  We found an original advertisement for these archived on the web, which is in the photos for context, (but not physically included with the item - we encourage the buyer to download the image to print and display with it.)  $100 - $150