Well you’re close, but not exactly right. What you are showing is a Colt “New Pocket†model (note the smaller, rounded butt). Some 30,000 were made between 1893 through 1905. In 1905 Colt superseded it with the “Pocket Positive†that was similar, but had a “positive†hammer block. They were made from 1905 to 1940.
I think the highly modified revolver Dr. Rob is interested in started life as an early “Police Positive†model (note the more square butt with rounded corners that were added when the gun was modified). That said, it could also be a very late Colt “New Police†model. It was similar to the Police Positive but lacked the hammer block. The New Police was made from 1896 to 1907 and the Police Positive replaced it thereafter.
I doubt that anyone gives a hoot about all of this, but in the unlikely chance that someone is . . . well now you know. I will say this about the gun that started all of this, “it is ugly, and it has seen better days, but whoever carried it must have been something else. It isn’t something you’dsee everyday.â€