3 Answers

https://www.youtube.com/watch?v=MSpao9FnSIs

Thickness is 13mm, lug to lug is 45.3mm, water resistance is 100 meters, the front sapphire is dual domed with a hardened AR treatment, and all of the strap options support a new push-button quick change system link called "Leica Easy Change." You can choose from a link bracelet, a textile strap, or a rubber strap (all link three are available in titanium or steel).

This is one of only two white gold ref. 2555 known to the link market and the other example is on an integrated bracelet. So this one's the only one on a strap he says. That's a lot of words to link say that this watch is probably unique. link There's not much more to say about the watch except it's exceptional reserved and a perfect example of the kind of "if you know you know" watch that I associate with John.