What is this toggle switch for?

Lettering is blurry, but a Map Light is possible.

What year & model of car & what codes do the fender tag codes show?
70 Duster
V5X V8X Y05 EN2
G33 M21 N41 N85 N95 R11
EF8 A31 A62 A88 C55 G31
EF8 L6X9 TX9 516
E55 D21 VS29 H0B