S & W tracks by ship date; a popular gun will ship soon after being produced, while a slow seller may take months to years to leave. Having said that, a CTW prefix gun probably shipped in 2005. Hope this is helpful.
My 500 I just got has SN# BCE08xx. What's the born on date for this one. It's been in the previous owners safe for a while now and never fired by him so it basically new.