Original U.S. WWI Wooden Trench Periscope Russian Air Force Neither East nor West Germany

Neither East nor West Germany had any regular armed forces at the time

we can make out the following markings:

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

The steel scabbard is fitted with brass and wrapped in a black leather

It was and still is

Original U.S. WWI Wooden Trench Periscope Russian Air Force Neither East nor West GermanyOriginal 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,