Earliest date would be sometime in June normally but I think these were not issued as early as normal.
#583 (my 2009 Battlestar bike) was made 11/08
#358 (my gen 2 engine test chassis bike) I don't have immediately available to see what date it was but it would be a little earlier.
#? (my 2009 chaindrive bike) I also don't have immediately available to see the date. I'll have to get all that info where I can access it easier lol.