Hi Leadbelly, many thanks for your efforts, but your song is
different yet again, ie, it's a third song with this name--it's not the
Blasmusikkapella-type song by Wolf/Katz, nor the Matrosenlied-type by
Hein and Büttner (which is the one I'm looking for) that starts:

Danke schön und auf Wiedersehen
Heute faehrt Dein Schiff ueber's Meer
ending with
Und die Zeit mit Dir war schoen (or something similar)

We'll get it yet!