Looks like it could be a satin nickel finish. Question is whether it's factory or post. Not sure if the factory did satin nickle on these or not, but given that the hammer and trigger are also plated, I'd have to say post factory.
Looks to be a 3.5" barrel.
How about a picture of the flip side, too.
And, if you take the grips off, there should be a number stamped on the butt, the serial number. Give us the first few numbers, substituting X for the last two or three.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.