Thanks all for the replies.
I guess I should have done a Google search first and would have saved myself and those who took the time to reply some time. I seem to overlook the usefulness of Google. To answer some of your replies:
Bompa - Thanks for the link. That made me put my question into Google and found the same page you gave me plus the issues with Zinsco Service Panels. Looks Like I'm going to have to step up my game in getting a Pro in to replace the panel. I'm very proficient
at doing electrical work and know I have the skills to do most of the work of adding a new panel, however, I am not efficient
at doing the work. This is something that I don't have the time to do. As (I think) dirty Harry said, "A man's got to know his limitations."
Wolf - I remember installing the new "twin" breaker a few years ago and it took a bit of effort to push it in. So unless it has arc'ed it self to the buss it should take at least as much effort to pry it out. Seems a previous owner tried with one because part of the breaker seems to have been broken off.
gmaint - Oh, my god
definitely shutting the mains off before I go poking around in there. The wire side has a lip (called it a hook in my first message) that fits under a metal bar (not the buss) can't pry from that end. Will have to pry from the opposite end from where the line screws in. In my panel only the main breakers have a mesh "cover" on them. A few years back I went to HD looking for Zinsco breakers, stores in my area didn't carry them. I found them at my local True Value.
Thanks again all for the help.