Welcome to the Forum. You have a very early 32 Safety, 1st Model revolver. This model was made from 1888 to 1902 and that revolver could have shipped somewhere around 1889 - 1890. Detailed photos are needed to assess the engraving, but could well be high grade factory applied with a gold washed cylinder. Might be a candidate for a factory historical letter, since distributors did not often order engraved revolvers and may have been ordered by an individual directly from the factory.