The first number after the T is the year of production, so in your case 2008. However there is a little bit of variability regarding whether that is a 2008 model or if it was a 2009 model built in 2008. (i.e mine is 50T900.... but when I called SRAM about it they advised it was a 2008 model).
Anybody can help me determine my RS totem year from serial number ? It looks kinda weird because first totem was relased in 2007 and my one have this number 03T0012089 . Its coil version silver one with 1,5 column.