Jonny69
Senior Retro Guru
The frame number is similar to a Sun frame number with the two letters followed by numbers. E-prefix would put it 1938/1939. It may be worth trawling the early Sun catalogues to see if it matches e.g. http://threespeedhub.com/wp-content/upl ... 938-UK.pdf
More on dating Sun and Parkes frames here: viewtopic.php?f=12&t=344162
More on dating Sun and Parkes frames here: viewtopic.php?f=12&t=344162