The '59 Chevy probably is an Impala. According with my info Bel Air two door sedan was pillared and Impala wasn't. In this case it would be a Impala 2 Door Hardtop Sport Coupe

Bel Air http://www.vuvox.com/collage/detail/013441fa39

Impala Sport Coupe Hardtop http://auto.howstuffworks.com/1958-1965-chevrolet-impala.htm/printable (roll down 1/3)

But perhaps the Impala was inside Bel Air series.