Original U.S. WWI Wooden Trench Periscope MG 13 which does not feature the

which does not feature the screw down back or arsenal markings

at the very bottom

There is also the script logo Olympia on the typewriter itself

On early examples the scabbard shell surface was factory blackened using a metal bluing process

The new cartridge improved upon the Hunt Rocket Ball with the addition of a primer

Original U.S. WWI Wooden Trench Periscope MG 13 which does not feature theOriginal Item: Only One Available. This is an original WWI essential; the life saving trench periscope! Truly an invaluable item while engaged in trench warfare, this periscope is a WWI survivor. It remains in good original condition, retaining much of its U. S. WWI olive drab green paint. The periscope is complete with its original adjustable leg and belt clip. The battlefield is viewed by the use of two opposing glass mirrors, one top, one bottom,