Linge-bar

Dutch collectors Paul Reuvers and Marc Simons own a simple, but carefully made cipher disk produced by Linge in Pleidelsheim. Can a reader help to find out more about this device?

Schluesselkasten-2-bar

The Schlüsselkasten (key box) was a small and simple encryption machine developed by the Germans in World War II. According to an NSA report, it could have changed the course of the war if it had been introduced a little earlier.