Purchased 4-23-12
Serial Number DXC00XX
Test Fire 01-09-2012

This seems to be the earliest date on this thread, so far. Guy at GS said that they sell them as quick as they get them, so is not one that has been on the shelf for a month or when ever they first shipped.
Wonder if they make 0000-9999 with each three letter combo in the beginning. Would be interesting to know how long they have been in actual production. Until we get many more posts on here, we wont know. Someone needs to do a spread sheet on the listed ones on here. So far highest 4 digit number was in 31XX range.