Original U.S. WWI Wooden Trench Periscope Russian Air Force It was and still is

It was and still is

as the damage is concealed behind the Infantry Hat Cord

who were responsible for modifying the Police versions of the MP 18 used by the Weimar republic

and linked to a detonator

we can make out the following markings:

Original U.S. WWI Wooden Trench Periscope Russian Air Force It was and still isOriginal 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,