Mini 14 Serial Number

Ruger Mfg Dates
Mini-14, Ranch Rifle, and Mini-30

Year Mini-14 Ranch Mini-30
1974 180-00001
1975 180-05101
1976 180-28282
1977 180-59251
1978 181-07488
1979 181-48351
1980 181-84879
1981 182-45601
1982 183-03581 187-00001
1983 183-40455 187-02611
1984 184-17175 187-13218
1985 184-26063 187-27226
1986 184-95448 187-50919
1987 185-14140 187-59308 189-00001
1988 185-50455 187-70033 189-15143
1989 185-56556 187-84127 189-17652
1990 185-81009 188-01157 189-25005
1991 186-05029 188-30499 189-38805
1992 186-18250 188-50902 189-51041
1993 188-66901 188-66901 189-52528

This info is from http://www.mini14world.com/mfg.html
if my copy doesn't turn out, check there.