Dave, The rifle in question # 2404830 does have a Winchester produced receiver. What I am saying is that a SA manufactured rifle with the same serial number may also exsist. You have nothing to apoligize for, no mater how long some have been involved in the study of the U.S. Rifle Cal .30 M1, there is always something new we can all learn from each other. If that was not the case we would soon become bored.