Anyone Have Info On a Delco 2B12 Portable Generator Please?

Possibly rare here, but maybe more common in USA 40's and 50's.

I may have to assist in restoration of the 12 V 150 W generator.
Haven't touched it yet.

I have seen a generic electrical circuit, but a circuit for this particular genset would be nice to have.

The petrol motor apparently runs OK.

I have already asked "Dr Delco" in the US and received some ino but not a specific circuit.

Thanks, mike

20150925_140302 lo Delco 2B12.jpg20150925_140328 Delco 2B12.jpg