I can't see it on Radiomusem:
https://www.radiomuseum.org/m/eap-e_gb_en_1~year.html
Presumably it's one of their earliest products. The fact that the model name is simply "Elizabethan" also points to this, I suppose.
OTOH, does it say "May 1960" on one of those big caps?
Good luck with it.