[Sean]

Originally Posted by spec

Congratulations, Ryan! Your E107 acquisition admits you to a rather exclusive fraternity, one that includes some of the most dedicated collectors in the hobby's history (Chris Sullivan, Lew Lipset, Scott Brockelman, the late Don McPherson among others, plus at least three people currently working on the set).
If, indeed, Bill Haber's E107s form the nucleus, your set has an incredible pedigree. As I recall, Bill told me he acquired the bulk of his E107s from a pioneer collector whose name I can no longer remember. And, it was my understanding that another hobby legend purchased the set after Haber's premature passing.
Bill Haber was much more than a Topps employee and baseball card collector. He was a founding member of the Society for American Baseball Research (SABR) and a peerless biographical researcher. Without Ancestry or the Internet he tracked down birth and death data for dozens of early ballplayers, filling blanks in the MacMillan Baseball Encyclopedia (an earlier generation's Baseball Reference). He focused his card collection on E107, Colgan's Chips (E254 and E270), T210 and T209 because many of the players he "found" or was pursuing were included in those sets.
So, know that your E107 set has long been treasured. Please treat it accordingly.
B0b Rich@rds0n

Great background on the set.