Well, I'm a bit confused on this one. The Spec Ord code indicates either a 1990 or 2000 build, neither one corresponds with a 629-3. The 629-3 was introduced in 1991 and lasted until 1993 with the start of the -4 version. The serial numbers of the 1993 started with B at the time and the Cs were shipping in 2000. I couldn't find any Ts, after a quick check in the Catalogue. The grips, and I think they are original, would point to the earlier -3s.
Yep, those Hogue grips with the metal decal are hard to find! But, that is a nice gun you can shoot to your hearts content and you got a great price. I would have bought it too!