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Jim ParkerOk, forgive me for this newbie question but I haven't seen it mentioned in other threads, but can the great T-Rex please help me understand why the t206 designers considered it a 460 series? Do we have a good handle on how ATC came to the figure of 460 subjects, when there were in fact 522 cards total? Is it as simple as there were 62 cards that happen to be of subjects already accounted for in the set (like the 4 cobbs)? I have been following Ted's every post for years now and just now it occurred to me that I don't know where the number 460 came from.