The Pam name does seem to have been dropped after a few more releases - "Radio! Radio!" dates this model as 1965 and lists three from 1966. Pye on the other hand had many years still to run.
There's another clone not mentioned yet, which is the only one I've owned - the Ekco PT438,
http://www.radiomuseum.org/r/ekco_tr...le_pt_438.html .
Paul