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Posted By: jeff s

Yes, E102 appears to be 1910. Yes, it probably will have some effect on the value of cards that were considered to be rookies in that set. The W555 set appears to be later than previously thought, as well.

However, there are so many sets that can safely be dated 1909 that it seems unlikely that one set would gain a bunch of value for rookie card premiums. There are plenty of cards of Cobb, Collins, and others issued in 1909 to choose from.