World War 2, B2 Suitcase Radio, Special Operations Executive, 1942

Example of a clandestine suitcase transceiver · 1942 Type 3 Mark II, commonly referred to as B2, a British WWII portable clandestine transceiver, also known as a spy radio set, developed in 1942 by (then) Captain John Brown at SOE Station IX, and manufactured by the Radio Communication Department of the SOE at Stonebridge Park. The set was issued to agents, resistance groups and special forces, operating on occupied territory. The official designator is Type 3 Mk. II but the radio is also known as Type B Mk. II, B.II and B2.

The B2 came in two flavours. The initial version came in an unobtrusive leather suitcase that allowed an agent to travel inconspicuously. This is the most well-known variant. Later in the war it was dropped by parachute in two water-tight containers, that were more suitable for use by resistance groups operating in the field.