SV dynamo mystery

[Ian Grace]

I'm in the process of sorting my dynamo and charging arrangement for my McEvoy. Unlike other SV Minors, my C45E dynamo has no TFR1 resistance unit mounted on it. Instead it has a circular resistance unit, performing the same function, mounted on the firewall. The date stamped on the dynamo is 233 - or February 1933 which seems to align with my chassis being laid down in May of that year, so I suspect that this dynamo is original to the car.

Has anyone else found a SV Minor with this arrangement?