[Chuck Schwark]

I understand that Philco used a sealing wax that had a high sulphur content and over the years/decades, moisture incursion along with the sulphur compounds creates weak sulphuric acid and that eats up copper very nicely. The "Greenies" is the blue-green copper sulphate leftover.

This is not an indictment of Philco. These sets were not expected to last 60-70 yrs after they left the factory.

Chuck