Flashlights where a vital tool for night time map reading, signaling with coloured lenses and many other uses. The blackout during the war also meant for a extended popularity of flashlights. Many carried them onto the streets to see as the streetlights where very rare and to top that of mostly blacked out. Most flashlights where fitted with blinds or coloured lenses to hide the bright light they produced. These coloured lenses where also used to signal between individual soldiers. Mostly used in the 1940s by the military and civilians alike. A small metal light signal box or flashlight.Petrix No. 678signal box, flashlight, petrix 678