Whilst searching for images of the 1935 Jubilee, I came across TV and Radio Bits' display of Radio Times covers from the 1920s through to the present day. The ones in the link window are from the late 1930s. Fascinating images, but also a rich social and cultural history resource. Look, for example, at how the BBC was representing its ability to transmit outside broadcasts in 1937. And if you're the sort of person who'd like to download every Radio 1 jingle from the 1980s, they're there somewhere on the same site too.