3 Answers

There's some rumors and theories about that some group hi-jacked it and took it somewhere and hid it. The next rumor / theory is that the Russians  hi-jacked it and hid it somewhere, b/c they didn't like the Russian muslims that were on board. And it's kinda hard to find a plane that's lying on the ocean floor , anyway.

Surprisingly, Waltham moved on from Lugrin and Aubert after around a decade. It's possible Meylan's success and his 1888 patent for a new repeater caught Waltham's eye. Maybe it was a question of design link – Meylan's chronographs and repeaters had a simplicity and elegance unlike Lugrin's mess of bridges and levers. link Maybe it was a last gasp to save production of complicated watches that never link really caught on.