+dustyriver Posted May 2, 2016 Share Posted May 2, 2016 Off the wall question . . . When did TB codes switch from numbers only to alph-numberic? I'm guessing in the are of 2006ish. Has anyone seen a good detailed "history" of TBs? When started, etc. Quote Link to comment
SillySailor Posted May 2, 2016 Share Posted May 2, 2016 As a wild guess, the switch from numbers only to alph-numberic may have occurred when the TB code changed from TBnnnn to TBnnnnn. I think this because the newest TBs I have recorded a numeric only secret key for are TBYQVN https://www.geocaching.com/track/details.aspx?id=475749 and TBYXPW https://www.geocaching.com/track/details.aspx?id=480436 both released by the same owner on Monday, 03 July 2006 (so produced by Groundspeak before then). Quote Link to comment
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