Super lucky on this one!
I picked up a large lot of JD McCarthy PC's and was pleasantly surprised to find that the Jim Bunning in the group was postally used and canceled in 1955...two years before his widely recognized 1957 Topps rookie card!!
Time to update my "rookie" checklist!
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http://imageevent.com/derekgranger
HOF "Earliest" Collection (Ideal - Indiv): 244/342 (71.4%)
1914 T330-2 Piedmont Art Stamps......: 114/119 (95.8%)
1923 V100 Willard's Chocolate............: 177/180 (98.3%)