Spy Device, Art Deco System Cane, France circa 1920
The parallelepiped handle elaborated with Macassar ebony, mirrors and glass, works as a periscope inside an optical case to look behind, it is 4,5 high x 2,5 x 12 cm to the side, there is a thin metal collar fixed with nails, it is on top of a tapering down Acacia Koa wood shaft and finished with a bakelite tip. This Cane is an optical device, the mechanics work wonderful, without wear or cracks the condition is perfect, this System Cane survives intact inside a cupboard the last 90 years!
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with mirrors or prisms at each end set parallel to each other at a 45° angle. Periscopes, served for observation purposes in the trenches during World War I. * Wikipedia