These levers are not in pristine condition as can be seen in the photos. They work OK. The left one is friction but the right one works in index or friction mode.The notch on the underside when mounted on downtube, governs which mode you wish to use.
To be used with compatible SunTour Accushift index derailleurs, freewheels and chains. Right rear shifter also has a MICRO INDEX mode that is basically a ratchet friction function that may be used with other SunTour non-Accushift index components or other manufacturers' derailleurs, chains and freewheel combinations not compatible with SunTour Accushift index systems.