[brianp-beme]

1910 is my vote, but the whole stretch from 1909 through 1912 includes a huge chunk of the Deadball era cards that a lot of us collect, and blows away all other four year stretches hands down. A beater collector like myself thanks all the producers of the various E and T cards (definitely the heyday for these ACC classifications) for their overwhelming prolific-ness during this time.

Below I have depicted just a small percentage of the sets that were available during that 4 year period.

Brian