crackled celadon rhino sculpture

the only thing i know is that this rhino sculpture has been purchased in the böttcherstrasse in bremen long time ago.
bremen is located in the north of germany
the böttcherstrasse itself is a tourist attraction in expressionist architecture and the just 100m long street is filled with art
It contains several art museums, Arts and crafts workshops
i don't know who did this rhino in crackled celadon glaze yet, but need to know.
https://en.wikipedia.org/wiki/B%C3%B6ttcherstra%C3%9Fe