Have a question...It was wrote

9MM "Confederate" revolver with "CSA" stamped as big as life on it - and then realize that the Liege proofmark on the gun is post 1877.

How can I find out what the Liege marks look like and where they are on a gun. I have one that has been in family since 60's and it has Block CSA on it. I figuring its a fake too, but am curious about checking it out.

Thanks
John