This is the factory deluxe optional
MAP READING LIGHT LENS
+
the Chrome diecast housing.. nothing more.
Found on a lot of GM vehicles from the 69- late 80's.
Including but not limited too:
- 76-81 Trans Am
- 69-81 Pontiac GP, Catalina, Bonneville
- 79-85 era Impala, Caprice
- + various Buick & Olds.
Also found on some Holden Statemans once.