Interested in getting a Walker 2d or 3d Generation revolver. As I understand it, the 2d Generation revolvers are really 3d Generation and come only in the Signature Series. AND all of those have Sam Colt inscribed on the back-strap. Is this true? I ask because I'd prefer to have a 2d Gen without the signature' my next choice would be a 3d Gen without the signature?. Any hope for me?