That STW will reach out there if that's why you bought it! According to a website I found on them the SB serial numbers were dedicated to the 9 lug Mark 5s from when they were introduced in 1995 to when they were discontinued in 2002, but that's the best I can do with no year breakdown anywhere I can find for you.
Last edited by Topgun 3006; 06-25-2015 at 09:47 AM.
Reason: Added info