The serial number can give the age as the Carrera?

: Early ones have smooth pushers, but once the Chronomatics are
: released and the smooth pushers run out, they seemed to have
: used fluted pushers on the Camaros. Some of the smooth pushers
: look to have been held back for first gen Carreras too, I'm not
: convinced any of those left the factory with fluted pushers,
: whereas Camaros clearly did. Poor Camaro, always the
: bridesmaid...