1959 Cadillac Coupe de Ville 2 door coupe rear quarter

1963 Cadillac Coupe de Ville 2 door coupe front

1963 Cadillac Coupe de Ville 2 door coupe front quarter

1963 Cadillac Coupe de Ville 2 door coupe profile

1963 Cadillac Coupe de Ville 2 door coupe rear quarter

1973 Cadillac Coupe de Ville 2 door coupe front

1973 Cadillac Coupe de Ville 2 door coupe rear quarter

1973Cadillac Coupe de Ville 2 door coupe C pillar badge

1976 Cadillac Coupe de Ville 2 door coupe profile
Cadillac rejigged the coupe so it was no longer pillarless in 1974 after which it perhaps shouldn't be considered a hardtop anymore; however, there were no frames around the door glass so I'll allow it.