Naushad, I've got 131 and 132 servos, and original KO with the external FET box, and some KO 1002 FET servos with the blue leads. These ran from about 1990 to 1994. If you settle on any of these and are after some, PM me. I'd like to think of them going to a good home, rather than continuing to sit in my old pit box! HTH