This servo is designed to be a gauge in a car, like for MPH or RPM. Bought a set of 6 on Amazon for $19.

These specs are from Adafruit, who show the part as out-of-stock.

  Axial Force Maximum: 150N
  Axial Pull Force Maximum: 100N
  Radial Force Maximum: 12N
  Rotation Angle Maximum: 315°
  Coil Resistance: 260 ohm
  General Tolerance: ± 0.1 / ± 5°
  Rotation Angle Maximum: ~315°
  600 steps per 'rotation' (315 degree rotation)

  ​Red-Line Dial Diameter: 13mm / 0.5"
  Red-Line Dial Length: 42mm / 1.65"
  Dial Thickness: 1mm / 0.04"
  Motor Diameter: 32mm / 1.3"
  Motor Thickness (w/o pins): 9mm / 0.35"

Data sheet for similar item