Geronimo -
The blue "pre-fire" easy open frames started around serial number 95,000 - I have the numbers what they ran to when the fire hit, but don't know where my records are now after a move. Easiest "approximate" guide between pre and post would be to look at the frame side plates. Pre-fire had the deep relief full body cougar - post-fire the hen scratched engraving. Not exact, but close enough to go by. All but the earliest post-fire also have a change in the breech face that was a good idea in therory, but with T/C's poor QC was a nightmare on the only post-fire frame I ever bought.
SouthernUtah -
They lost a lot more than just the wood shop, also lots of tooling which they never replaced (the products they were for dropped when old inventory spared by the fire ran out). I also again saw the G2 proto's they had at the last LV show, but that was nearly a year ago and they were singing this same tune then - bet it won't be any differnt at this years show in Orlando (2 weeks away). But more importantly, that new frame you just got... if they did a trigger job on it, please PM me and I'll fill you in on something you should be made aware of.
Ladobe