I've had the good fortune to acquire a couple of his first reels that clearly show the stages of development of the ball-handle.
The earliest was very unpopular with anglers of the period, who complained that their gillies were losing fish.

The next model proved to be more useful, but the gillies complained of difficulties in grasping the cranks.

At last, Conroy was inspired by a discovery in his own shop...

...and the ball-handle was born!
