These 4-3/4″ Rear Combination Lights were used on all CASE Tractors thru the ’40’s ’50s & 60’s. Just like the originals with the correct knob, the lens measures 4 3/4″. Switch has 2 positions. Turn knob to one position & the work light comes on, turn the knob to the next position and the red tail-light comes on. Just like the originals, the lens says “Guide Tractor Lens” . The lights are painted bright red and come in 6 or 12 Volt.