COLORS   Porcelain 1906-15.  1910-19 TABS Aluminum.
1906   White/Dark Blue                      1915   White/Light Blue
1907   White/Red                            1916   Black/Orange
1908   Black/Yellow                         1917   White/Brown
1909   Black/White                          1918   White/Dark Blue
1910   White/Dark Blue                      1919   Red/Black
1911   Black/Yellow                         1920   White/Dark Blue
1912   White/Woodgrain                      1921   Black/Gold
1913   White/Green                          1922   Brown/Cream
1914   White/Black

1923, 1925, 1927, 1929, 1931   Gold/Dark Blue
1924, 1926, 1928, 1930, 1932   Dark Blue/Gold

1933, 1935, 1937, 1939, 1941   Gold/Dark Blue
1934, 1936, 1938, 1940, 1942   Dark Blue/Gold

                        1943 TAB   Black/Red

1944, 1946, 1948, 1950, 1952, 1954, 1956   Gold/Dark Blue
1945, 1947, 1949, 1951, 1953, 1955, 1957   Dark Blue/Gold

BASEPLATES   All aluminum except 1962 Type 3.
1958-64, 1970 BLUE MAP                Gold/Dark Blue
1965-70   GOLD MAP                    Dark Blue/Gold
1971-76   LIBERTY BELL                Gold/Dark Blue
1977-84   KEYSTONE OUTLINE        FR  Dark Blue/Gold
1984-2002 KEYSTONE, CONSTITUTION  PR  Gold/Dark Blue
1994-2001 WILD RESOURCES      FR  Blue & Black/White, Gold & Green
2000-05   WEB ADDRESS TYPE 1  FR  Dark Blue/White, Gold & Light Blue

2005-23   WEB ADDRESS TYPE 2  FR  Dark Blue/White, Gold & Dark Blue

STICKERS   All are Fully Reflective.

           Colored Serial all years, even some c.1981 "T".
1959, 1961, 1963   Gold/Dark Blue              1966   White/Red
1960, 1962, 1964   White/Green                 1967   Red/Dark Blue

1968, 1970, 1973, 1975   White/Red
1969, 1972, 1974, 1976   White/Blue

1978 (UR) White/Blue     1983, 1991, 1999  2007, 2015   White/Blue
1979 (UL) White/Red      1984, 1992, 2000, 2008, 2016   Black/White
1980 (UR) Blue/White     1985, 1993, 2001, 2009, 2017   White/Green
1981 (UL) Red/White      1986, 1994, 2002, 2010, 2018   Blue/White
1982      Blue/White     1987, 1995, 2003, 2011         White/Red
                         1988, 1996, 2004, 2012         Green/White
                         1989, 1997, 2005, 2013         White/Black
                         1990, 1998, 2006, 2014         Red/White

T (Temporary 1974-80)         Black/White
T (Temporary SEP-80 - 2000)   Red/White

Rear window stickers issued in lieu of plate stickers in
Philadelphia in late 2000, later optional.  Yellow "05-03" seen.