blademedia,
I do not think those three holes are direct fixing points for a Precision 1.2m dish. If you check the 1.2m dish face for the rivet heads that hold the tubular steel mounting ring on the back of the dish they are in a circle of approximately 58cm diameter. The ring used by Precision for a 1.2m dish was 60cm diameter. The circular plate on the motor mount is too small to mount the dish directly onto it, there would need to be an adapter plate or some type of metal framework to scale up to the 3 fixing points on the Precision dish.
One of the photos in the listing shows the motor close the the dishes, it's fairly easy to see the motor circular plate is undersized for the rear mounting ring on the Precision dishes.
Rgds
I think the mount looks similar to one that
@Trust1 has, although his mount looks beefier.
Somewhere on sat.co.uk there is a thread where he takes the thing apart to see what's inside...
The mount was for an old American PF dish IIRC, where the clever bit is the declination control, which is performed by loosening the bolt on the bracket that attaches to the dish, and then rotating the whole dish.
I do not remember the name, but I'm sure Trust1 can fill in the details.
Somewhere on this site I even remember seeing the manual for one for one of these dishes...