Quietline headlights ?
 

Was headlights a thing you could get?

Headlights for the Quietline tractors were standard on the 1450 & 1650. All other models were optional.

One could get the headlights from the 1450/1650 models and install them on the other Quietlines.

It will be a crapshoot whether the switch will be any good on used headlamp parts.
They can be repaired and cleaned though