Slo' Poke Pete,
There is no No. 2 offered within the New Model No. 3 reproduction S&W type series of arms.
The Number designation is based off of the frame size. The Number 3's are of the large size frames, usually based on and around the 44 caliber. (.44 Henry rim fire, .44 American CF and the .44 Russian, and so on.) The No. 2's were .32 rim fire only and a much smaller frame size.
Model numbers such a "NO. 3 Model 3 Russian" is based off of a Model variation within that frame size.
The Model designation within S&W's can be very complex and confusing.
I hope this helps.
My best,
Blair