HSTE[Omega Moderator]
4530
Just because ... I really like it for its design, its rarity, its wearability. (A number of pics incl. macro shots).
The Heuer Autavia Mareographe, ref. 2446C SF from the early 1970ies.
There are obviously "Orvis" branded and "A&F" branded versions around but it seems that the "Heuer" branded are by far the rarest.
I really like this iteration of the Autavia.