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- type : Technology (remove)
- related units : 26th Australian Infantry Battalion (remove)
- related subjects : Periscopes (remove)
- related places : Europe: Western Front (remove)
Maker: UnknownCollapsible trench periscope. The body is made from a series of six telescopic metal rings which can be extended for use, or collapsed for storage. At the top of the periscope is a rectangular mirror ...