Hey, Mr. Tiger, great post. dont be so tight lipped, and come forth with a lot more info. You could have a gem in the rough. Plenty of help here on the Forum. Will not lead you astray.
Mr Tiger we need pictures. As large as possible, shot with good lighting, no flash, from as many angles as possible. Please show the entire revolver in every picture.
Welcome! I think a hearty "Happy New Year!" is appropriate.
Sounds like you have inherited the quintessential Smith and Wesson police revolver of the early to mid-20th century. When I was a kid every cop I saw carried one of these in his holster.