While I am aware that Perry Mason was originally a novel series, I kind of grew up on the late 1950's/early 1960 Perry Mason series on CBS which was set in then present day when the series was done.

The HBO series Perry Mason is set in the early 1930 (in 1932 I remember right) and it ran for 8 episodes on its first season.

In this first season centers on a kidnapping that goes horribly wrong and while Perry Mason is initially a private detective he becomes a lawyer during the course of the series.