The main mark of the Aztecs is the SD spear that interlocks in the middle. The original design hasn't been altered all that much. There are a few significant changes, namely the changing of the copper borders around the S and the D to white. The "State" that was once shaded inside the S has been removed. The Aztec spear head and tail have been shortened on each side. And the letters appear a bit smaller on each side.
2013 - Present
Scarlet letter “S” interlocked with a black letter “D” and black spear going through the middle of the letter “D.”
2002 - 2012
Scarlet with gold trim letter “S” with a wordmark “STATE” in gold interlocked with a black with gold trim letter “D” and black spear going through the middle of the letter “D.”
1997 - 2001
Aztec head wearing a headdress over a red wordmark “AZTECS” in red with white trim on black with gold trim banner.
1983 - 1996
A Aztec warrior wearing a scarlet, white and black headdress.
1961 - 1982
Red Aztec petroglyph.