I have the service revolver in battlefield finish, and I love it. They are very good replicas, supposed to be made according to the original patent. They are a pleasure to handle and shoot, for a replica pistol they are accurate too. I believe there are 3 models; Civilian, Police and Service available in .177 or .22 and either standard black or battlefield finishes.
There are a couple of places that currently have the Service in .177 Battlefield in stock (OnTarget and Vector Air)
On a recent post on here, the .22 seems to be far more popular than the .177. I have both the 6"and 4" in .22 and the 6" is a bit of a powerhouse ( when compared to other co2 replicas)