Used, tested, and working. 
Very nice chrome, will polish up beautifully. Ivory handle. Functions perfectly, smooth rotation from handle. 
H1 - 12 volt 
Shaft length: 12 - 5/8" 
Shaft code: P 
Center to Center: 17 - 1/2"
Overall length: 21 - 1/2" 
This link is to the Unity website where it shows all the application vehicles that this spotlight will work in.
https://www.unityusa.com/Full-Application-Guide-by-Shaft-Length_ep_136.html