In a nutshell ... how do you tell which is a New York and which is a Kentucky gun??
Case in point ... Marlin 45/70 1895GBL. Its been in the gunshop maybe 12-24 months. Left side at rear of barrel is the JM mark. But the serial number is stamped on the left lower side of the receiver like a Rem870 pump action shotgun. Memories a bit hazy, but I thought Marlin's were serial numbered on the tang?