Era 1966-1975 No weight on private plates; "P" prefix optional for private trucks with no weight (began 1967) 1966 (pair) white/blue 1967 (pair) blue/white few with smaller font 1968 (pair) begin reflective letters white/black 1969 (pair) white/blue 1970 (pair) "1670 300 YEARS 1970" white/green 1971 (pair) white/brown 1972 (pair) white/black 1973 (pair) white/blue weight codes discontinued; previous "H" truck get regular random-issue 1974 (pair) last year for pairs white/green 1975 (single) white/maroon Era 1976-1981 all single plates 1976 "1776 Bicentennial 1976" top blue/white 1977 red/white 1978 green/white 1979 black/white 1980 blue/white 1981 red/white < back to 1960-1965 | No letter prefix; Weight stamped left side 1/2 year changes to May 15 First year?? essentially same as above, but high weight codes receive leading letter 1/2 year changes to June 30 First year?? > forward to 1982-present |