I would guess your no dash was on the tail end of the no dash run. I have a -1 with the prefix of AWT which puts it right after yours in production.

I have never sent my -1 back to Smith for the recall as I have never had any problems with it. I'm sure it has only a few hundred rounds fired so maybe down the road it may show some signs of binding but I will wait and see. I trust it. It is a 2 1/2" with the best trigger of all of my K's and L's and I hate to mess with it.