That humongous German made Siegfried went on to a new owner in Canada. A 19" seat was just far too big for me, even though it was a gorgeous saddle.
My current Siegfried is a 17.5" seat, so much more properly sized for me.
Yep, what you have is definitely a Stubben, and as you can see, they come back beautifully. Both of mine looked worse than yours before I cleaned and oiled them up.