The 47 clipper is the third old car I have owned. Previously I owned a 1957 Buick, and I still own a 1953 Chevrolet Truck. All of them have had a problem with the speedometer. The Buick didn't work at all, and I gave it a shot of light oil. That was a disaster. It then bounced around from very fast to nothing. I haven't tried to repair the one on the Chevy truck. It is a big truck, with a top speed of around 45 miles per hour, so I have just ignored it. I haven't driven the Packard much because the motor is out being repaired, but the little I have driven it the speedometer acts like it needs lubrication. It doesn't make any noise, but the indicator hand is sluggish. I can't tell if it is giving me a true speed, but when stopped the hand doesn't always return to zero. One would think a little oil would solve the problem, but with my past experience, I' afraid to try that.
Any suggestions would be appreciated.

Thanks for the replies. The motor for the car is currently out for a rebuild. When I get it back and everything is hooked up so I have current for the clock I will see if I can get it to run. I can remember when I was a child my father had cars with clocks of this kind, but they never seemed to run. I can remember them ticking, and the click of the switch that closed to rewind them.

I remember the clock in automobiles built in the 47 50's era and as a rule they didn't work. However as a future project I would like to see if I could have the one in my 47 Clipper repaired. Does anyone have any suggestions? I don't know where to start looking.

I forgot to mention the car is a 1947 Deluxe Clipper

The underseat heater constantly runs and in addition makes a clunking noise. For now I would like to simply disconnect it, and worry about fixing it later. How do I do that?