If he had just stopped with what he accomplished with Breguet, that would already have been a career. But since he became its principal watchmaker in his 20s, he had plenty left to offer, as we've since seen. His own company's watches from the early 1990s are the most sought after today. The one pictured above is from the early 2000s, after Bvlgari bought his and Gerald Genta's brand names, and before Bvlgari subsumed his work.
I'm currently translating resources from Russian and Vietnamese, as it appears his watches enjoyed some popularity there. There is precious little additional information available in English, French or German that I have seen (so far) except for one or two fine articles penned by collectors.