When I say, "FactCheck COLB image," I am talking about the image they posted on their website, June 16, four days after both the Daily Kos and FTD posted theirs. This image had the certificate number covered by a black rectangle.
The photos, on the other hand, now show us that the BIRTH YEAR (1961) is the number that follows "151-" on all certification numbers printed after November 2001.
Thanks! That clears it up for me. I was thinking you were using the newest COLB FactCheck just posted.
I caught on to the certificate numbers sometime back after seeing different COLB. I figured out that they all began with 151, then the birthyear. So I knew Barack's if real would have to be 151-1961-something.