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The changeover was no sooner than 74 and may have been 75. I used to know! It seems unlikely that Matsushita would have kept any tube stuff in production, at least not for very long. I have wondered about the same thing, whether any Motorola designs survived for long. Seems I had read somewhere that they switched to Japanese chassis' but I don't know how widespread that might have been.
I had a 19" Motorola Quasar which I parted out. The crt was basically dead & the chassis was very rough, having sat out in some weather. Sams pegged it as 73 as I recall but I determined somehow that it dated from very late, probably close to the end. I found one label floating around loose inside that referred to Matsushita. That TV was very cheaply made, I felt, and was 4 or 5 tube. Had a black matrix tube and I wished it was in better shape because I would have liked to have seen what an "end of the line" Motorola could do.
One more comment: the EIA number on that CRT was 337 (if I recall right) which comes back to Westinghouse. What were they doing in the CRT business that late? (they were out of the TV business) I have not been able to find an EIA list newer than 1972 so I guess it's possible somebody else was using the number later on but I don't think they worked that way.
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Bryan
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