i am thinking your missing the 2 letter prefix that's in front of the numbers. other wise they are just random numbers also if you do a search on here. there is a few older posts that will tell you what you want to know or give you links to the records your looking for. i have dated all my BSA that way. and for the wisecracks that will be coming. no they where not cheap dates and no i did not blow my load after the date