In my eyes This looks like a gyro of some sort, What purpose could it have had? It was partly installed on my boat which has a spartan level of electronics. :
Raymarine-Gyro Plus 2 SHS/Marine Gyro Compass Sensor-E12101/Tested! - Max Marine Electronics
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Raymarine Gyro Plus 2 SHS/Marine Gyro Compass Sensor/E12101//Tested - Max Marine Electronics
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Raymarine Gyro Plus 2 SHS/Marine Gyro Compass Sensor/E12101//Tested - Max Marine Electronics