I had a K32 Model 16 that had the same Baughman sight....
Roy could not find any records for the special sight, but when he saw the gun at Columbus SWCA, he said it was correct. In fact, at that show, I saw 3 K-22 with the ramp sight.....
What a classic beauty, you really have the luck to find such a revolver. The grips have wonderful grain and color. MAkes me wonder if it was a special order for someone special. Even the screw driver is special, a nine banded blued one, dates from 1940-1958.