David Ichim, writing for Watches by SJX, takes a deep dive into the history of the development of the Ulysse Nardin Freak, designed by Ludwig Oechslin.

It's interesting to note Oechslin's use of a Patek Philippe Gyromax balance and corresponding KIF anti-shock setting in the original prototype. These would later be replaced with Ulysee Nardin's own, in-house, free-sprung balance wheel and Incabloc shock-resistant jewelled bearings.

Not visibly evident in the finished product, as well, is that massive mainspring, which would ultimately provide the watch with its formidable 7-day power reserve—a notable improvement over earlier prototypes' approximately 10-hour power reserve.