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Public Service Commission generally regulates Commercial and For-Hire transportation, among many other things. As far as license plates are concerned, PSC plates were generally the precursor to Apportioned plates, though there are some differences and there was an overlap in issuance 1986-1992. In most cases PSC plates were used in conjunction with other plates, usually a weight truck plate.
Today, a system exists of a sticker applied to the side of a tractor-trailer, or an internal code on the registration of For Hire vehicles, such as Charter Limousines, Taxis and Buses.
First issue 1926?
Last issue 1992
Generally identified by number-letter prefix 1926?-1965
marked P.S.C. 1966-1992
passenger colors assumed 1926-1965
Image from a magazine advertisement showing a P.S.C. plate (top) in conjunction with a weight code L plate
Prefixes:
1A 1C 1E 2E 25E 31E 41E 52E 61E 1F 2F 21F 22F 41F 61F X1A 2ME L1E L2E R1A R1F
working theory: need confirmation
F for Farm Products
C for Commercial
R for Replacement plates
X1A Car carriers
(X=dealer on other plates)
ME for Mobile Equipment
(wreckers/cranes/etc)
1926 "SC" inside Palmetto Tree design
"PUBLIC SERVICE" bottom
red/white
1927"SC" inside Palmetto Tree design
"PUBLIC SERVICE" bottom
colors unknown
1928
colors unknown
1929
colors unknown
1930 "IODINE" vertically on right side
assumed white/black (repainted plate shown)
1931 "THE IODINE STATE" bottom
colors unknown
1932 "THE IODINE STATE" bottom
colors unknown
1933 "THE IODINE PRODUCTS STATE" bottom
colors unknown
1934 "APRIL 30" or "OCTOBER 31" bottom
colors unknown
1935 1/2 year "JUNE 30" or "DECEMBER 31" bottom
black/white known; other combinations possible
1936 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1937 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1938 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1939 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1940 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1941 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1942 1/2 year "JUNE 30" or "DECEMBER 31" top
colors unknown
1943 1/2 year "JUNE 30" or "DECEMBER 31" bottom
restamped from collected plates - most from '42 December
June-colors unknown; Dec-yellow/black
1944 restamped from collected plates (standard-size plate)
no month (June)-red/white; December - black/white
1945 1/2 year "JUNE 30" or "DECEMBER 31" top
June - yellow/black; December - colors unknown
1946 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1947 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1948 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1949 1/2 year "JUNE 30" or "DECEMBER 31"
June - colors unknown; December - silver/green
1950 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1951 1/2 year "JUNE 30" or "DECEMBER 31" top
June - colors unknown; December - yellow/black
19521/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1953 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1954 1/2 year "JUNE 30" or "DECEMBER 31"
June - colors unknown; December - yellow/black
1955 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1956 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1957 1/2 year "JUNE 30" or "DECEMBER 31"
June - black/yellow; December - yellow/black
1958 1/2 year "JUNE 30" or "DECEMBER 31"
June - black/yellow; December - red/white
1959 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1960 1/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1961 1/2 year "JUNE 30" or "DECEMBER 31"
June - black/yellow; December - colors unknown
1962 1/2 year "JUNE 30" or "DECEMBER 31"
June - colors unknown; December - black/white
19631/2 year "JUNE 30" or "DECEMBER 31"
colors unknown
1964 SC-"JUNE 30TH" or "DECEMBER 31ST" - 64
June - black/yellow; December - white/green
1965 SC-"JUNE 30TH" or "DEC. 31ST" - 65
June - red/yellow; December - white/black
1966 "SC P.S.C. 6-30" or "12-31 66" bottom
June - white/red; December - colors unknown
1967 "19 P.S.C 6-30" or "12-31 67" bottom
colors unknown
1968 "19 P.S.C 6-30" or "12-31 68" bottom
colors unknown
1969 "19 P.S.C 6-30" or "12-31 69" bottom
June - red/white; December - colors unknown
1970 "19 P.S.C 6-30" or "12-31 70" bottom
June - colors unknown; December - black/white
1971 "19 P.S.C 6-30" or "12-31 71" bottom
June - colors unknown; December - black/yellow
1972 "19 P.S.C 6-30" or "'12-31 72" bottom
June - white/green; December - black/yellow
1973 "19 P.S.C 6-30" or "12-31 73" bottom
June - white/brown; December - colors unknown
1974 "19 P.S.C 6-30" or "12-31 74" bottom
June - white/orange; December - blue/white
1975 "19 P.S.C 6-30" or "12-31 75" bottom
June - white/blue; December - colors unknown
1976 "19 P.S.C 6-30" or "12-31 76" bottom
June - white/green; December - colors unknown
1977 "19 P.S.C 6-30" or "12-31 77" bottom
June - white/maroon; December - colors unknown
1978 "19 P.S.C 6-30" or "12-31 78" bottom
June - green/yellow; December - blue/tan
1979 "19 P.S.C 6-30" or "12-31 79" bottom
June - white/blue; December - colors unknown
1980 "19 P.S.C 6-30" or "12-31 80" bottom
June - white/red; December - colors unknown
1981 "19 P.S.C 6-30" or "12-31 81" bottom
June - green/yellow; December - blue/orange
1982 "19 P.S.C 6-30" or "12-31 82" bottom
June - orange/blue; December - colors unknown
1983 "19 P.S.C 6-30" or "12-31 83" bottom
June - yellow/red; December - colors unknown
1984 "19 P.S.C 6-30" or "12-31 84" bottom
June - white/green; December - colors unknown
1985 "19 P.S.C 6-30" or "12-31 85" bottom
June - white/red; December - yellow/green
1986 "19 P.S.C 6-30" or "12-31 86" bottom
June - green/yellow; December - colors unknown
1987 "19 P.S.C 6-30" or "12-31 87" bottom
June - white/light blue; December - colors unknown
1988 "19 P.S.C 6-30" or "12-31 88" bottom
June - yellow/red; December - colors unknown
1989 "19 P.S.C 6-30" or "12-31 89" bottom
June - white/green; December - colors unknown
1990 "19 P.S.C 6-30" or "12-31 90" bottom
June - white/light blue; December - colors unknown
1991 "19 P.S.C 6-30" or "12-31 91" bottom
June - white/red; December - colors unknown
1992 "19 P.S.C 6-30" or "12-31 92" bottom
June - white/green; December - colors unknown*
*final issue was 1992, but unsure if June or December was last.
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