Tonatiuh, Aztec Sun God Museum de Kukturen, Basel
There are 22 eagle feathers surrounding 4 Ollin (earthquake) which is the current era. This may be a reference to the 22-year binary sunspot cycle.
Stone of Moctezuma 1 Stone of Tizoc
Museum of Anthroloogy, Mexico city Museum of Anthroloogy, Mexico city
Disco de Filadelfia Stone of Sacrifices
National Stone/ Moctezuma's Throne
Museum of Anthroloogy, Mexico city
The Aztec Sunstone
Museum of Anthroloogy, Mexico city
Note the positions of holes for gnomons and other markings on the backdrop that may correlate to extremities of moon rise (photo: G. Stray). Tonatiuh's face is at the centre of the Ollin symbol.
More detail here note the surrounding holes that may have once held gnomons for casting a solar shadow across the stone.
Possible original colour scheme....
Though this is more likely...just the central motif shown HERE...for the whole image, see Beyond 2012 colour plates....
HERE IS THE SUNSTONE ANIMATION: