Tim Cathey to the rescue:
https://t206resource.com/Print%20Group%201.html
But I think the juice is generally not worth the squeeze with these, as far as determining rookie cards. Except for team changes, I think the simple solution is to consider all T206 subjects to have 1909 release dates. I don't think most people have a desire to declare Piedmont 150s rookie cards but Piedmont 350-460s not.
EDIT: But it does look like Chance's red portrait card was the first to be released. I know we're settled on E107 being Chance's rookie card (or W600 if you're into that), but if T206 was his rookie card, do we think there would be support for only putting the label on the red portrait? It first was released in 1909 but the batting and yellow portrait cards not until 1910.