I just took apart 3 old 67-68 clocks that did not work. Once I lube them up with Duralube (aerosol) with the clock face up and used a an air nozzle (light pressure) on them all three work fine. Afterward I set the clocks face up with a paper towel folded 4 times under them for 2 days to pull and get rid of the excess oil. BTW to take one of the clocks apart you need to straighten the four tabs and remove the terminal on the back. I heard I should use sewing machine oil but I didn't have any. I know Duralube blows away WD40 so that is what I used. I have a dehumidifier in my garage with a fan that has the bushings that are worn out. If I use WD40 it squeels after 2 days. With the Duralube 6 weeks. I did that test many times. No more WD40 for me. Just thought I'd share some things I found out. Ray
Biggest problem I've found with old clocks is the contacts on the rewind mechanism. They get pitted or dirty over years of constant rewinds - a little gentle rub with crocus cloth, or 2000 paper and there good to go again ! :TU: