After reviewing the additional OP's pictures, several items stand out which I believe leads me to believe this revolver is a highly modified Triple lock.
1st point, the barrel looks to measure 7" which is an anomaly. The front sight would I think need to have been reinstalled if in fact this had been a 71/2" barrel. I'm just guessing, but the barrel with Triple Locking feature intact would indicate that it was original.
2nd point, when viewing the cylinder, the cylinder stops lack the correct
leading recess cuts. I'm only guessing, but, either these were filled in or a cylinder would have had to be machined without them.
3rd point, the frame has been modified by removing material on the bottom of the butt and then contouring it into a round butt and making the grip shorter. This would explain the restamping of a serial number.
The triple lock Yoke "could" be original, but the center pin is "not" or has been modified.
Just my opinion that somebody wanted a "Modified" Triple lock and this is the result.

baldeagle8888