Good question. I am not sure of the answer. I know that Robinson, Doby and Paige are all in there. Doby has three variations:
Paige can be found with and without the "An Exhibit Card" legend. I think the Doby and Paige were first issued in the same series. Jackie I am not sure about.
There is a thread elsewhere about determining the issue dates. I haven't the time to search it out right now.