From what I can gather, it looks as if the S&W factory primarily used Goncalo Alves wood for its checkered Target Stocks on Model 19s and other vintage revolvers. What other types of wood did the factory use for its Smooth Target, Presentation and Combat revolver grips? I would like to buy the last three types for my Model 19 and want to make sure they are factory original grips. Thanks for your help.