I’ve read the other post on this site about this type of handgun, but my husband’s father left him this gun: 3 inch barrel, black powder revolver (5 shooter). It’s the blue medal. We are trying to find a value. When we removed the barrel grips, the only numbers we see are I (or 1, or X), 478. So no T then a number. And there is 478 on the bottom of the trigger area and PAT. Nov 17,08 (which makes think it was made in 1908?) On the bottom of the grip. Any idea if there is any value for this gun? We definitely know not to put it into circulation.