This is the Sanwa/Airtronics High Speed, High Torque Micro Digital Wing Servo. Also known as the Airtronics 94761 servo, this micro wing servo features dual bearings, metal gears and impressive specs.
Torque: 4.8V: 55.00 oz-in (3.96 kg-cm); 6.0V: 66.00 oz-in (4.75 kg-cm)
Speed: 4.8V: 0.15 sec/60°; 6.0V: 0.12 sec/60°
Weight: 0.81 oz (23.0 g)
Dimensions: Length:1.06 in (26.9 mm), Width:0.47 in (11.9 mm), Height:1.18 in (30.0 mm)
Motor Type: 3-pole
Gear Type: Metal
Rotation/Support: Dual Bearings