SG-41-DM-PM-bar

The SG-41, also known as Hitler Mill, was the successor of the Enigma encryption machine. Detectorists have now found a specimen in a Bavarian forest.

CD-57-Variant-BSI-bar

A few years ago I took pictures of a rare encryption device from the Cold War era. Can a reader help to find out more about it?

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.