Rpg hit it about right. A hard gun to put a value on with that combination of features. As it is, maybe $1500. If you must sell the gun, I would be inclined to remove the grips and keep them. . .ivory grips are so impossible to come by these days. Then I would try to sell it with some replacement grips for around $1K. Oriental engraving is not likely the most desirable.

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Dr. B