Years ??

The Case of the Angry Mourner (1957)

https://www.imdb.com/title/tt0673180/reference/

Raymond Burr ... Perry Mason

Barbara Hale ..... Della Street

https://www.imdb.com/title/tt0673180/trivia/

Della arrives at the lodge driving a 1962 Cadillac Series 62 Convertible.

Perry later drives it to visit Belle Adrian.

https://www.imdb.com/title/tt0673180/mediaviewer/rm1488168193/

.