Rexophone crystal set with two pairs of Telefunken headphones (out of three), 1923-1930 Radio Communication 1923-1930
Great Western Railway steam locomotive 'King George V' 4-6-0 King class, No 6000, 1927 Locomotives and Rolling Stock 1927
Experimental television receiver used by JL Baird in demonstration, made 1925-1926 Radio Communication 1925-1926