Those are close, Shadorne, but no cigar (I believe). They both have the wood surfaces meeting without the 45 degree bevel that CE's speaker had. Also the wood of his speaker appears to be thicker than on the Tannoy's. The Lancaster has the driver mounted closer to the top than on CE's speaker, and the bottom cutout on the Devon is different.
My guess is still that it was a Stephens, similar to the model shown in my 1960 Allied Radio catalog but bigger. Stephens was a California company which made some well regarded speakers, some of which (although I'd assume not this one) were physically designed by the famous furniture designer Charles Eames.
So as a celebrity living in California, he figures to have been aware of the Stephens brand and its reputation. Considering that, and the fact that the rest of the system looks like it could very well have been purchased at an Allied store (which sold Stephens), that theory seems to me to hang together pretty well.
Best regards,
-- Al
