Hi Kevin, I have one that looks identical, but it is un-badged. On mine the front cover is 110mm long, the flywheel is 124mm in diameter and the cranking handle is 144mm between the centre of the square hole that fits the spindle squares and the centre of the wooden handle that is used to crank it. The set in the top of the cranking handle is approx. 30mm from the face that is close to the drill body when it is in position and the centre of the handle and is approx. 34mm down from the square hole. The handle also toe's in towards the drill body, the wooden handle is 80mm long. You can view my one stripped down in this **LINK** although the last three photos are not part of this drill.
The screw just below the flywheel puts pressure on to the shaft attached to the flywheel, via a spring and a steel ball. Turning the screw inwards puts pressure onto the shaft which in turn increases the inertia on the flywheel and thus drives the drilling spindle downward with more force.
I can do a sketch of the handle with the dimensions on tomorrow if need be.
Regards Nick.