The rosewood grips (lower right corner of the top photo) are the only ones I have ever seen. Also, the grips in the upper right hand corner came on FT 44 serial number 233 shipped in January 1957. They have what I call a polished finish and are unlike any other Ruger grips I have seen.
Doc, great selection of some Ruger grips. I also like the contoured walnuts often found on early .44 Flat Tops. Some of these have remarkable figure in them. I also like the type of grips often found on the RSSE guns. They seem to have more dark streaks with lighter color walnut. The variety of "bark" and conformation in stags is really quite amazing to me. It shows the natural look of various sources of horns. You have a mighty fine collection and thanks for sharing. Brass Frame/Lee E
Brazilian rosewood can be identified by its color and grain. Particularly when compared to other woods such as American walnut or Goncalo alves. I have lots of S&W stocks made of Brazilian rosewood to compare the Ruger stocks to. Some stocks made in the late 70s and later were made of Honduras or Indian Rosewood, but these woods are easily distinguished from Brazilian rosewood. It helps (sometimes) to have a reference book on woods of the world.