Colt Walker Information!

I have come into possesion of a Colt Walker. Serial number 1052. I have had a couple of Colt novice collectors evaluate the gun for authenticity. Both can't prove either way if it is fake or authentic. One collector is of the opinion the grips especially are too new for the rest of the gun. Can anyone out there give me any guidance on my next step to value/authenticate this gun? I can provide photos electronically. Thanks, Kyle.