Quite a bit more information on the Philips “Innoval” valve series and its Rimlock-to-noval transition may be found at these web sites:
https://www.radiomuseum.org/forum/ea..._innovals.html
https://www.radiomuseum.org/dsp_mult...s_innovals.pdf
No real surprises, but they provide confirmation of previous deductions.
Cheers,