I suppose if people are taking collecting my coins seriously, I might as well point out that the series 1 coins were made and distributed in prefix order, with 11xxxxxx being the first, 12xxxxxxx being next, etc. The lower the number, the earlier the coin.
Can you explain this further possibly? Is the prefix related to the public key? https://www.casascius.com/fulllist.txt
Simply look up the pub key on blockexplorer to see when it was funded/created.