No matter how much anyone in our hobby debates the issue it is abundantly clear what Burdick wanted. He knew the sets were similar and he still accounted for them the way he did. Maybe a few series should have been cataloged differently but they aren't. Just as T206 Old Mills are T206 and the Red Border Old Mills are T210, so are T213 and T215 each in their own group. Each of the latter 2 series have differences that would not fit into T206 (such as thinner stock or blue captions). I don't own the Griffin anymore..
