PR: Proprietary Items What are these Millers off?

[ogrilp400]

G'day All,
I have been tasked with identifying what these Miller generators are off. The commutator end is similar to the Miller generators we know but the drive end is a puzzler. They look to be 3 1/2" but a short series. The duplex drive sprocket is most unusual.

 

[delboy]

Look like dyno's from Miller Dynomag's as fitted to many Series "A" 500's, but they are 3" diameter.
delboy.

 

[Albervin]

Looks like the dynomag from my New Imperial. I will have to check numbers.