Charles -
You and I have a lot of overlapping Kenmore knowledge! We seem to refer to machines differently (or from a different perspective) at times. The more I deal with machines now, and do research, etc. I "store" them in my head by their model years, which are part of the model numbers.
You're absolutely right, there were 800s offered in 1967, just not new models that were introduced as 800s during 1967 that got 1967 model numbers. Does that make sense? The only way I know that is that no data is there in Sears' site when looking up either 110.6704800 or 110.6714800, etc.
The white '65 800 that I got recently was made either in late 1966 or 1967, I can't remember at the momemt. It is 'early' enough to have a bakelite agitator but a plastic drive block on a splined shaft.
If you recall a just-archived post of a green '65 800 in Pensacola, well, that beast has found it's way to my door (strange story I'll share one day) and it was made in 1968 believe it or not! Late '68 to boot. So yes, to answer your question, the '65 800 carried over into later years, into late 1968 at least, which amazed me when I saw the model. Mine is not the last revision either, as there was one more. My model number is 110.6504806. The line started in late 1964 or early 1965 as 110.6504800, and wrapped up at 110.6504807. Each time they change the last digit, a small engineering change was made to the machine that caused a part number change in the parts list. The difference I see between my two machines involves the agitators - the white machine is bakelite, and the green one has the later polypropylene black plastic agitator. There were obviously other revisions that I can't see or haven't discovered yet as well.
But, in a nutshell, yes there were 800 series machines in 1967, just not models that were introduced that year. In all honesty there were probably several available 800s, including this '66 set.
I wish I knew why some models had such short timespans of availability, and others were out there for so long.....