I’m drawn to ultra legible, simple, military-style watches for whatever reason. The 556a is sort of an attainable grail watch for me. Maybe there are “better” watches that achieve the above but the first time I saw one my thought was “I gotta have one of these someday”.

I don’t know much about the rest of the Sinn lineup but that’s my take on the 556a anyway.

It’s a different company but consumer electronics is where my head goes first when I hear Zenith.