Being toooooooooo scared to take this little clock apart....gear by gear.... I elected to "oil er up" and hope for the best. The best did not come. I could not get it running again. So.........I used my air compressor (at low pressure) and blew the gears and bearings as best I could. Then I hooked the wires to her, and she is still ticking after 24 continuous hours. I'll leave her on my test bench for awhile longer to see how she does.
In the meantime, I contacted Palo Alto Speedometer, and they can rebuild mine with a quartz movement for $195 (+tax & shipping). A new bezel, lens, and bulb are extra cost. Another option is for me is to buy one of their quartz clocks for $265 (+tax & shipping) that would match my clock's appearance. The latter option seems the best since I could just keep my original clock.
I'm not necessarily a purist on something that can easily be converted back to "stock", so I'm not beyond buying a less expensive VDO quartz clock if it will fit in the hole without modification.
Not settled yet on what I will end up doing long-term. If mine passes another 24 hour test...........I'll run her till she quits again.