It's almost certainly a Colt New Army & Navy Model. Since it's a .41 Long Colt it was a commercial model.
It should have hard black rubber grips with molded in checkering and Colt logos.
The serial numbe will be in two lines on the bottom of the butt.
Here's some general info from the Colt forum I wrote. Some of it will not apply to your revolver:
Caliber will be .38 Long Colt or the .41 Long Colt. Later models (after about 1903) were chambered in .38 Special and 32-20.
These have very complicated and rather fragile actions. Treat it gently. If the something breaks or gets out of order it's pretty much toast. Few gunsmiths will even look at one, and replacement parts are almost unobtainable.
The Colt New Army & Navy revolver was the world's first double action, swing-out cylinder revolver, first sold in 1889 as the New Navy, then starting in 1892 as the New Army also.
These were sold as US government issue revolvers in .38 Long Colt with 6 inch barrels, and as commercial models in .38 Long Colt, .41 Long Colt, and in the last few years of production, in .38 Special and 32-20.
Commercial barrels were 3", 4 1/2", and 6 inches. Finishes were blue or nickel on the commercials with hard black rubber grips with molded in checkering and Colt logos.
Military issue guns were finished with a commercial level bright blue and smooth wood grips.
Production ran from 1889 to 1907, with regular improved models made during that time.
It was the New Army in .38 Long Colt that failed in the Moro War in the Philippines and led to the development of the .45 Automatic.
The actual serial number is the two line number on the butt. As above the other numbers are factory assembly numbers and should all match.
If you'd like to know more you can buy a Colt Archive letter from Colt. This letter will state in what configuration the gun left the factory, any special order features like fancy grips etc, and who it was shipped to.
If it's a military model it will have US military stamps on the butt and the actual serial number stamped in two lines.
If it's a commercial model it will have only the serial number on the butt, again in two lines.
Military models will also have a military inspectors stamp on the left side of the frame above the cylinder latch.
RAC was Rinaldo A. Carr the US military inspector for these guns.
The other numbers stamped on parts are factory assembly numbers used to keep fitted parts together during manufacture.
These numbers should all match. A non-matching part is a replacement.
Value is determined by how much percentage of original finish is left, the gun being in original configuration (grips) and it being in proper working order.
These guns have notoriously fragile, complicated actions and break or get out of order easily. Treat it gently. If broken repairs and usable parts are pretty much just unavailable.
As strictly ball park values here's what my copy of the Blue Book of Gun Values says:
Prices would likely be slightly higher in todays market.
Note that before about 1901 these guns were NOT made to shoot the .38 Special, even though they will chamber the .38 Special.
If the gun is inspected by a gunsmith and declared safe to shoot, you can still buy .38 Long Colt and .41 Long Colt ammo, and you can shoot VERY light hand loads in .38 Special cases.
Since the bore is slightly larger then the .38 Special accuracy will not be very good.
These guns are best as historical displays.
Post the serial number from the butt and I can tell you when it was made.