I have an old revolver which belonged to my Grandfather. I think it is from around the 1920's or so.
It is Harrington & Richardson, shows patent 1847 on top. Cannot find a serial number. It is '32 caliber, top opening, self extracting 6 shot. The hammer has no spur on it, guess you would call it a safety type hammer. The only number I found was under the grip, it is
#4 78 88. There are also the numbers 888 twice on the inside of the cylinder. See attached photos. Hope you can tell me more.