Update: calling Remington turned out to be the best idea. They were very prompt and able to tell me the year (1984) in a matter of seconds and were also kind enough to send me an owners manual for free ninety free. Thanks again!
"Freedom and reason make us men; take these away, what are we then?"
-Sometimes your best defense is a good reminder of your common sense-
HK USP Compact 9mm - SA XDM 4.5 .45 - Browning Medalist .22 - Ruger 10/22 - Browning Superposed O/U - Remington 1100 - Remington 720 .270