I need some help with some information about a series 70 Gold Cup. It has the small roll marks on the slide and a serial number ending in N70. I have found reference to it being manufactured in 1982. Blue book shows production of 70 series ran through 1983. I have a guy telling me it is a reproduction and the last series 70 Gold Cups were manufactured 1977-1979. I have seen countless small rollmark series 70's for sale and have never heard mention of them being reproductions. I would appreciate any information on these.