2 Answers

Spaceflight aficionados await the 50th anniversary Apollo 13 Speedmaster due in April 2020 but link close friends of mine dream of a "classic" Speedmaster with a 60-minute bezel as worn by several astronauts, such as Apollo 15 Alfred link Worden who link preferred a 60-minute bezel as the Tachymetre scale bezel was considered useless in space.

If however you want something which blows the idea of incremental improvement right out of the water link the man you want to talk to is Andreas Strehler. Strehler is not a name you're likely to be link familiar with unless you've been taking a close interest in independent watchmaking but if you're looking for a record for moonphase accuracy which is unlikely to ever be beaten and I do mean ever you should be familiar link with the Sauterelle à lune perpétuelle.