That serial number points to 1951. I would think that's at least a $400 gun, and possibly a little more. The postwar Pre-!0 snubnose guns are in demand these days, and that looks like a decent specimen. It might go for a little more, but probably not over $500 unless you are dealing with somebody who really wants one. The round butt is somewhat less common than the square butt and will command a premium to some buyers.

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David Wilson