LEDEX MOTORIZED ROTARY SWITCH. 28 V. Dc. RELAY CONTACTS ADVANCE ONE POSITION WITH MAKE AND BREAK OF THE 28 VOLT MOTOR. PROGRESSIVE SHORTING OF THE LARGE CERAMIC SWITCH AND THEN OPEN CONTACTS. THERE ARE ADDITIONAL WAFER SWITCHES ON THE BACK SIDE FOR OTHER CIRCUITS. MAYBE LIGHT FOR SWITCH POSITION OR ?. DO NOT KNOW WHAT THIS WAS FOR, BUT A NICE MOTORIZED SWITCH. FRAME MEASURES 3 1/2" WIDE AND 3 1/4" TALL. NEW MIL SURPLUS NSN 5999-00-690-2514.