[captainclock1988]

Patrrick, I have an extra dial lamp assembly on a 37-630 chassis I am stripping for parts. I need the electrolytics and clamps for the 37-640 I am restoring. It does not mount with a screw. The assembly has a spring metal clip that slides onto a metal tab. You'll have to clean it up, and spray the inside of the reflector with chrome paint, or re-plate it, and replace the center contact wire and rubber squishy inside. I used a tiny grommet from the auto parts store when I rebuilt the last one. I think Ron made a post about this a long time ago, you can see if you can find it. It is actually pretty easy and straightforward. I'm sure you can figure it out. PM me if you are interested. I'll be rebuilding the one for my 37-640 and will do photos showing how I do it. It uses the same part.

Hi Mike, I apologize for supplying misinformation concerning the dial lamp, I just assumed the negative contact for the pilot lamp on this model's dial lamp was wired up similar to how the 116's pilot lamp assembly was because of the radio being made only a year later than the 116. 

But that was going to be my next guess as to how it was wired up, which was using a clip that slid onto a metal tab that completed the lamp socket's circuit, rather than using a separate wire lead that was screwed to the chassis.

But its good that he'll have an option for getting a socket through a fellow forum member here.