The "dull appearance" of the left stock was probably from a Mold that had been used a lot and the surface had dulled down. All it would have taken was to polish the mold a little and they would then have "shine" again to them.
leo, that's a great revolver you have.I like the duller look of your grips vs higher shine. Its cool pc and rare one in 4.75". a month ago I picked up a 5.5" in 38 spl. mfg 1956. mine has walnut grips. Fellow said they were original to the gun. don't see any numbers inside but they are concaved inside like the rubbers are. that is the wood stands taller all along the edge of grip frame.
you have a nice find but not to nice to shoot. Phil
Thanks for the kind words. One of the driving factors on the purchase was, I have .38 Special with 5 1/2" barrel just 3,330 numbers earlier. They are a great brace of SAAS with serial numbers 14444SA and 17774SA. I really like the repeat in numbers.
Your grips sound original and serial number would have been marked with white pencil. Probably washed away with oil and time.