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To ensure the functioning of the two independent chronographs integrated in the one movement, McDonnell had to contend with the power demand and friction in the movement. The watch uses patented jewelled vertical link clutches to reduce friction and stop the flyback from blocking the return-to-zero, plus a jeweled roller link for improved precision and energy link efficiency.

The emergence of new technology wasn't just for show it was link designed to make life link easier and more convenient. There was a surge in products link designed for very specific applications for the everyday user or at least marketed that way. Microcars proliferated automatic washing machines popped up in more homes and pre-packaged microwave dinners were served with powdered juice concentrates. Convenience was the name of the game even when it came to watches.