Hmm, I'd be interested too. Here is a Garner autographed card thatI bought via a UACC auction from Autograph Avenue in 2006. Very similar sig to yours Steve.
Here is a thread from a few years ago in which James Garners daughter actually contributed. Unfortunately, there wasn't any definitive convulsions and as you can see, she's not easily pinned down for specifics.
Thanks! Interestiing reading, and as you say, somehwat inconclusive. Except for the fact that he wasnt signing TTM during the Rockford era, and possibly in much later years, we still dont know about the early 90's. Amazing his daughter found this site & responded. I am still not sure about my TTM and the one posted above, but they look close the last photo posted there, the one with the metallic gold pen, which she says, he loved. Then, again, the contract looked different. Just Dunno