Is This a WW II Jeep 6 V Generator ?

My motorhead friend has told me that this is a WW II Jeep 6 V generator .
Could this be true?
I have never seen one with a three bolt flange like this.
Auto Lite - Stamped; M 4090 4H

 

never seen one like this, Have you been on g503 they are the expert, This might of been used on a go cart or car for kids, back in the days

 

The flange and pulley are unusual. I don't think it is for a ww2 jeep because the features just don't add up. To the best of my knowledge there is no provision to mount that flange on a Willys Go-Devil engine (nor would it work as with the Go-Devil the generator is mounted on a pivoting arm which allows for tensioning the v-belt -- I don't see a way to adjust belt tension with that profile of flange), nor is there a use for the unusual pulley profile.

Perhaps it is from one of the early postwar CJs and your friend misremembered? I know nothing at all about the CJs.