Thanks folks, my understanding is that its the original 6v starter with solenoid upgraded to 12v.

I was blown away when the person who rebuilds starters contacted me and said they cannot rebuild it due to the aramature needs repairing, apparently in some spots it will spin and others it wont, so its a couple of short circuits on the armature, i genuinley thought thatwould be part of a rebuild.

My idea of a rebuild and others is clearly different, joys of getting old we have different expectations.

Steve