Yesterday I bought a Borg clock off ebay for 45$, a heck of a lot cheaper than the 675$ plymouth version currently on ebay. It came out of a 1948 Desoto, so I figured the clock can't be too different from the one that broken in my car. Photos attached show the clocks side by side. After some work I've stripped them both down and found my plymouth clock was a mess, all stuck up with some green goo that was most likely a past effort to lubricate. The Desoto version was clean, but there was one spring balance that was loose which i tightened. I tried the clock with some battery power and the solenoid wound once, however it would not remain ticking. Im unsure how these are supposed to work, Im thinking that they may need constant power to run? Can anyone confirm that? So my plan going into this is to replace the dead plymouth clock guts with the good Desoto clock guts. What I've found is that the time set rod is the only difference in the two works. When I get more time I will swap the rear frames from both works and that should do the trick as it will position the rod closer to the center of the clock. Stay tuned for more in this adventure...
First image shows the Plymough clock on top of the Desoto clock. Second image shows the Plymouth clock on the left. Third image shows the nice clean Desoto clock works on the right. By the way it appears that this clock has never been taken apart.