Testery

The Testery was a section at Bletchley Park, the British codebreaking station during World War II. It was set up in October 1941 under Major Ralph Tester. 4 founder members were Tester himself and 3 senior cryptographers were Captain Jerry Roberts, Captain Peter Ericsson and Major Denis Oswald. All four were fluent in German. From 1st July 1942 on, this team switched and was tasked with breaking the German High Command’s most top-level code Tunny after Bill Tutte successfully broke Tunny system in Spring 1942.