Federal signal strobe mirror MS2-fd dual head - light

What is for sale: Federal signal strobe mirror MS2-fd dual head - light

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This is for a Federal Signal Mirror Strobe Dual Head Light
This may have light dust and scuffs/scratches on it as it is USED.
Model # on it is MS2-FD. MS2 = Mirror Strobe Dual Head & FD = Ford
I have not checked this out as I do not know which wires to test out with a 12v source, and I do not wanna damage it.
I accept Checks or Money Orders only.