Hi Michael,
although this is an old thread, I was very happy to see these pictures! And disappointed to learn that you did not succeed to identify this piece. All this why? because I have the same piece! only mine is with yellow coloring, and not green. The only additional info I can provide is that I bought it in the Czech Republic about two years ago, in shop a along the road from Novy Bor to Zelezny Brod... The shop label on the piece said just " Kotik? " .... so not much help here.
Still, if in the meantime you learned some more about it, I'll be very happy to hear it too.
BTW, I love your collection! it makes me envy any time i browse through it...
Assaf