First issue 1921, when Weight Codes introduced.

All plates expired October 31 of year marked. 1/2 year same as passenger 1934-1936; Earliest truck-specific 1/2 year known 1956.

Plates marked with TON but no leading letter believed to be Trailer (prior to 1965)

Restamped plates known 1943, 1948, 1951

jump to modern era: 1982-present


weight-based letter coding used 1921-1971

1921 (single)

red/black

1922 (single)

black/white

1923 (single) variation known without dash

white/dark green

1924 (single) script "SC" in circle

black/orange

repainted; should be orange

1925 (single)

white/green

1926 (single) "SC" inside Palmetto Tree design

green/white

1927 (single) "SC" inside Palmetto Tree design

green/white

1928 (single)

black/yellow

1929 (single)

black/white

1930 (pair) "IODINE" vertically on right side

white/black

1931 (pair) "THE IODINE STATE" bottom

green/gray

1932 (pair) "THE IODINE STATE" bottom

black/yellow

1933 (pair) "THE IODINE PRODUCTS STATE" bottom

black/white

1934 (pair) "APRIL 30" top or "OCTOBER 31" bottom

black/yellow(April); yellow/black(October)

1935 (pair) 1/2 year "APRIL 30" top or "OCTOBER 31" bottom

white/black (April); black/white(October)

1936 (pair) 1/2 year "APRIL 30" top or "OCTOBER 31" bottom

yellow/black(April); black/yellow(October)

1937 (pair) "OCTOBER 31" bottom

black/white

1938 (pair)

black/yellow

1939 (pair)

black/white

1940 (pair)

yellow/black

non H, opposite colors?

1941 (pair)

black/yellow

1942 (pair)

yellow/black

1943 (single) restamped from collected plates - most '42; rare unstamped exists

yellow/black

1944 (single) strip applied to existing 1943;

weight class matched, plate number did not necessarily

yellow/green

1945 (single)

yellow/green

1946 (pair)

silver/black

1947 (pair) some restamped known (shown)

black/yellow

1948 (pair) some restamped known (shown)

yellow/black

1949 (pair)

white/black

1950 (pair)first year actual weight marked on plate

black/white

1951 (pair) some restamped know (both shown)

white/black

1952 (pair)

yellow/black

1953 (pair) begin P-prefix for variable weight (Commercial vehicles); other letters for Private vehicles

black/yellow

1954 (pair)

white/black

1955 (pair)

black/white

1956 (pair)

black/yellow

1957 (pair)

white/blue

1958 (pair)

blue/white

1959 (pair) H numbers >99999 no "1TON"

white/blue

1960 (pair) last year for J, L, N, etc prefixes

blue/white

1961 (pair) last year weight marked on plate (H only)

red/white

1962 (pair)

white/red

1963 (pair)

white/green

1964 (pair) begin 2-letter prefix, (overflow from single letter)

white/black

1965 (pair)

black/white

1966 (pair) P-prefix dropped, but still considered Commercial

white/blue

1967 (pair) transition to smaller font;begin P-prefix for private/weight-based tax

weight-marked considered Commercial

blue/white

1968 (pair) begin reflective letters

white/black

1969 (pair)

white/blue

1970 (pair) "1670 300 YEARS 1970"

white/green

1971 (pair) last year of "H" class indicator

white/brown

1972 (pair) previous "H" truck get passenger random-issue or "P" prefix for weight-based tax purpose

white/black

1973 (pair) 1/2 year changes to May 15th

white/blue

1974 (pair) last year for pairs

white/green

1975 (single)

white/maroon

1976 (single) "1776 Bicentennial 1976" top

blue/white

1977

red/white

1978

green/white

1979

black/white

1980 1/2 year changes to June 30th

blue/white

1981

red/white