I bought a S&W victory .38 special ctg with a 4 inch barrel and what appears to be a parkerized finish. Would someone PLEASE help me with a few Q's, as follows:

Approximate date?- SN is V62017
Under the checkered (medallions) wood grips there are the letters "R-SB" - the number 678 is over it. There are two "X" on the bottom of the butt under the grips. What do these mean?
There is half a round thing with what looks like a piece of a wing on the bottom of the butt to the left of the lanyad hole - the lanyard ring is missing. I'm wondering if the grips are original (I suspect not). photo(16).jpg

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