Based on some talks given at Audio Engineering Society conventions, the late Zenon Schoepe of Resolution Magazine asked for a summary article on microphone specifications. It appeared in the March 2011 issue.
Legacy Microphones Josephson Engineering has manufactured microphones in California since 1988. One that was made only in a limited edition and no longer available is the C720 20th Anniversary model. It's a different approach to the Series Seven adjust-pattern-in-mixdown idea, you can read the manual here.