Andy -
Thanks for the video!!! Perhaps I should not have, but I half expected to hear that this machine has a quiet-pak skinny belt, which it clearly doesn't. PartsDirect is down for nightly maintenance so I can't check the '66 and '68 LKs to see if they have the skiny belt, but this may be one of the differences between the Lady and the 900?
I wish I was more familiar with the '66 that I had. I could help you guys (Jon and Charles) better in figuring this machine out. I did notice earlier today that the '66 Lady and this '66 900 do have some subtle differences in timers - in fact they have entirely different generations of them. The Lady's timer is of the expected mid 60's standard frame, five digit part number sequence (87xxx), and the 900's is in the six digit 36xxxx, possibly quick disconnect, but clearly very different timers.
As to the pricing on these Charles, it's tough to say. I have only one catalog that features the '66 Ladies, and none that have the 900s. This machine should have been marginally cheaper due to the designation, and surely so by 1968 when the fancier LK came out.
I may be thinking too much here, but generally speaking, as models advance in the Kenmore hierarchy, their model numbers increase with them. The original Lady K for 1966 models is 110.6604900, as I've mentioned. Oddly, and I've only seen this a few times, three models exceed the Lady in model numbering that year, the 910, 920, and 930. The 930 is a 2-speed Roto-Swirl machine, which clearly is a rung or two down from the Lady in features - lacking two of Kenmore's prized sales features of the time - a 3-speed motor AND the Roto-Flex agitator. This machine here is a 910 (I don't remember the particulars of the 920 as it was last year that I researched it).
BUT, my point is that these three follow-on models must have been introduced AFTER the 1966 line was originally planned, or the Lady would have had the top model number. The reasons behind how this happened I'd love to know but I can't imagine that the tiny differences between the Lady and the 910 machine warrant a sales slot on the floor. I can see this machine very much as the step-down machine from the '68 Lady, but if it was introduced in 1967 or 1968, why use a '66 model number?
I wish parts direct was online, I could check a few theories, but these three follow-on 900s must have been created out of necessity for reasons that the Lady could not offer. The parts lists are usually dated - I'll check that in the morning.
As to the video, THANKS Andy, it's pretty cool. There is some definite bearing noise there just like you said, but I have to say, I LOVE fixing stuff like that where you get obvious results for your work!!
Gordon