S&W Lew Horton 66-4

[greenbone]

Dose any one know the real answer to this. Lew Horton made a few runs of the the F comp 3 inch 66-4. I have one, Pre fix # LHF 006X and it's a performance center gun with uncle mike grips. Can anyone tell me if it's the 1,2,3,4,5 run.Seems to be a lot of opinions on when these guns were made. I would like to know the date and number made of this LHF006x. First, second, third run.

Thanks Glen