I found this motor in a spectrometer with a driver board. The controlling software and hardware are long gone. I would like to revive the instrument by skipping the original driver and driving this motor using Arduino and associated driver modules.
The motor seems to have two sections, each section has its own red, black, grey, and yellow wires, 8 wires total. But I am not certain it is a “standard” 8 wire stepper motor. It also has gear reduction inside, allowing for slow, fine rotation angle control. I searched the web but only find this: Two Airpax k82416-P1 step motor Labview Arduino control - YouTube
I believe the original drive system is called Compudrive, made in the 1980s.
Here is a picture of the motor: