[Jon A.]

Probably stock, I saw resistors in series with a CRT socket once before. Not right in the socket though. This setup may be unique to the consoles considering zeno's comment.

Edit 1: Scratch that, I just found out the resistors are normally hidden, at least in early SS sets with standalone CRT sockets. I just dissected a Zenith CCII CRT socket and it has the same value resistors, just with different tolerances.

Edit 2: Still not quite right, looks like the bad socket used to have a cover, and the resistor going to the focus pin is a different value than the one in the Zenith socket. I had to scratch off the Bondo (?) to find out. Every resistor from the bad socket has a 10% tolerance band, those in the Zenith socket are all over the place.

With no small effort I pulled the pins from the bad socket, noting the wire positions beforehand.