[retiredinprescott]

The big problem with a Philco 70 speaker is that you can't remove the field coil to get it rewound. It is held in place with a very tight factory pressed fitting. I don't know of anyone who has been able to remove one without destroying the speaker. The Philco 20 speaker, which is similar, has a field coil held in place by a large nut which makes removing it easier.
Both speakers are becoming quite expensive when you find them, especially when you are restoring a basket case with a very damaged cabinet that is never going to be a beauty queen....