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.

Adafruit info:

This stepper motor is a little different than the large NEMA-17 types you may be used to. These are often used in gauges for motorcycles and cars to replace the old-style fully-analog type. They have extremely fine step precision of about 1/2 a degree per step, 600 steps for single stepping, fast response for quick movements, and a range of ~315° degrees. Their smooth motion makes good for small projects that need a dial indicator, and more precision motion than you may get with a needle gauge.

Since this is a bi-polar stepper motor you do need to have some sort of H-Bridge to drive it. A L293D or TB6612 will do the job nicely. If you have a microcontroller that can drive 200 ohm loads you might be able to use the direct pins without extra MOSFETs, just remember to include kickback/flyback protection diodes!

Note that the motor is quite 'weak', not good for moving anything but a light indicator. We include a red-line dial that fits nicely on top by pushing onto the needle shaft.

  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