This is the CS-70 Super-Torque Metal-Geared Ball Bearing Servo from Hobbico.

FEATURES: Universal Connector Fits Futaba, Hitec, JR, KO Propo, Airtronics Z,
            and Tower Hobbies. KO Propo. Not Airtronics old "A" plug.
          Used Where Very High Torque and a Strong, Precise Gear Train is
            Needed in a Standard Size Case; for Large or Competition/
            Performance Aircraft.
          Metal Gears for Optimum Strength and Reliability
          Precision Light-Weight Aluminum Output Gear for Quicker Response and
            Tighter Deadband.
          Dual Ball Bearings for Ultra-Smooth Precise Control
          Surface Mount Technology (SMT) Allows This Servo To Be More Reliable
            In High-Vibration Environments.
          Direct Drive Potentiometer Improves Neutral Accuracy

          WARRANTY PERIOD: One-Year

INCLUDES: One CS-70 Servo w/Round Servo Horn
          One Large X-Shaped Servo Horn
          One Small X-Shaped Servo Horn
          One Small Straight Servo Horn
          Four Rectangular Rubber Grommets
          Four Servo Mounting Screws
          Four Brass Eyelets

                          4.8V                        6V
SPECS:    Speed:         .24 sec                     .20 sec
          Output Torque: 106.7 oz-in (7.7 kg-cm)      133.3 oz-in (9.6 kg-cm)
          Weight:        1.94oz (55.2g)
          Length:        1.59" (40mm)
          Width:          .77" (20mm)
          Height:        1.48" (38mm)
          Signal Pulse: Positive Pulse Control 1520us Neutral

                                                                     kh11-30-01
Use Hitec servo horns and savers.
For Servo Horn Screws use FUTM2265
For replacement gear set use Hitec #55302 (HRCM5302)
                                                               updt jxs 4/28/03