I recently picked up a nice Pre-29 4 screw which had the stocks replaced. I would like to find out what stocks might have been available from the factory in the time frame that my S170xxx was produced. What I think I have found out so far is that the threaded metal escutcheon that the screw goes into should be flush with each side of the stocks not sunken like the later stocks. Also, there should be a diamond patern around the screw inside the checkering. My 4" Pre-29 revolver has TH and TT. Would it only have come with TS? Did any in that time frame come with smooth stocks? Only walnut?