Well, thank you everyone for your feedback!
Unfortunately, I had to shorten a lot the budget in my chase for a kind-of-dressy silver dial watch, so I had to forget the Zenith. To be more precise: it´s not forgotten, it´s just in the background waiting.... maybe a used one in a few years.
Meanwhile, I discovered the Seiko SARB065 (aka Cocktail Time), available in Japan only. It´s also a beauty to behold, 40 mm case with transparent case back (very simple and not very decorated movement).
And the price is something around 15% of the Zenith´s, which was a deciding factor.
Here is mine, recently arrived, among his/my teammates!
In a few years, I hope, I´ll return to the quest for a Zenith. One of 2 grails I would love to have: Either the above mentioned Captain Dual Time or a SS New Vintage 1969!