How do you find out how old a H and R 32 top break pat date Oct 4 1887?

To determine the age of an H&R (Harrington & Richardson) Model 32 top-break revolver with a patent date of October 4, 1887, you can reference historical records and firearm catalogs that detail production years. H&R produced this model from the late 19th century into the early 20th century, so the serial number on the revolver can help pinpoint its specific production year. Additionally, consulting with firearms collectors or experts can provide more precise information regarding its manufacturing timeline.