This is the National Radio Company HRO 5T Receiver. These radio sets were used extensively during WW2 at Station X, the code breaker's radio monitoring centre at Bletchley Park in England. This particular receiver was built around 1938. It was my own first real communications set bought in 1966 when it was already nearly 30 years old. I paid 17.00 GBP for it. I still have this radio receiver.