I think Trevor is probably right, a later war or postwar replacement crank case, the two examples shown above are over 15,000 apart so very unlikely to have been done in the factory in such a similar way.
Rob
I think Trevor is probably right, a later war or postwar replacement crankcase, the two examples shown above are over 15,000 apart so very unlikely to have been done in the factory in such a similar way. But we can change it nowadays with Ebillwizard and it's easy nowadays for us.